Karaoke Box Mayfair: Private Karaoke Rooms Open Till 3 am

Karaoke Box Mayfair sells private karaoke rooms by the two-hour block in a basement at 14 Maddox St, London W1S 1PQ, three minutes on foot from Oxford Circus. It stays open until 3 am from Thursday to Saturday, and every room is paid for in full when you book. If your search for private karaoke near me starts in the West End shopping streets, this is the closest room with a door that shuts and a late licence.

Karaoke Box opened its first rooms on Frith Street in Soho in 1997, bringing the Japanese idea of the karaoke box to London: a sealed room for one group, its own screen and microphones. The Mayfair branch followed in 2010, and the brand's own page sums it up as "Since 2010, on Maddox Street." The two venues share a booking system but feel different. Frith Street is the Soho original on a busy restaurant street; Mayfair sits on a quieter commercial street of galleries and tailors, with the entrance at basement level.

The homepage counts ten private rooms here, and the booking system lists them by name, which tells you something about the house sense of humour. The Padded Cell is for two, the Ice room for three, Lucky 4 and Mambo n.5 do what their names suggest, and the mid-sized group rooms are called Gold Room, Mix Tape and Show Girls. The two biggest, Luxury Room Amanda and Meadow Room, take up to 12 people. That is the hard ceiling, so a team of 14 needs two rooms booked side by side.

Room prices are not posted as a fixed rate card. The online booking page prices each room for the date and start time you pick, so the same Gold Room costs more on a Saturday night than on a Tuesday afternoon. The useful rule is that the size of the room sets the bill, not the number of singers, so a group of five in a seven-person room pays for seven. Pick the smallest room that fits everyone and the cost per head drops noticeably.

Until Friday 30 October 2026 the venue is running an October Early Saver deal: 30% off the room charge for sessions that finish by 9 pm Monday to Thursday, by 8 pm on Friday, or between noon and 7 pm on Sunday. Saturday is excluded, and the offer still requires the standard two-hour minimum. For an after-work birthday, a 6 pm to 8 pm Thursday booking catches the discount and leaves time for dinner afterwards.

Food and drink are ordered from the room and carry a 12.5% service charge. The cocktail list runs from a Negroni at £13 to an Espresso Martini at £15 and a Porn Star Martini at £17, and the cocktail bar closes at 00:30, so put the last cocktail order in before then on a 3 am night. A 175ml glass of Pinot Grigio is £8 or £32 for the bottle, a Staropramen is £6.22, and a Coca-Cola is £5.20.

For a celebration the menu lists house Champagne at £59 and Moët at £86 a bottle, which is the usual order for hen parties in the bigger rooms. The food is straightforward sharing fare rather than a reason to come: edamame at £6.50, a margherita-style Pizza Rita Ora at £13 and a Pizza Pepperoni at £15. One honest tip is to eat before you arrive if the group is large, because pizzas for twelve add up quickly and the room clock keeps running while you wait for them.

The song library is the main event. Karaoke Box quotes more than 40,000 songs, which covers the big singalong catalogue in English plus a solid run of other languages. Queue several tracks at once so the screen never sits idle, and agree early who holds the remote, since the person by the screen tends to end up running the whole session.

The terms, last updated in August 2026, are stricter than a pub back room. Bookings are paid in full upfront, and the minimum is two hours. Cancel 72 hours or more ahead and you can take a refund minus a 10% administration fee, or move the date once with no fee; inside 72 hours the booking is non-refundable. During the festive period from 20 November to 23 December, bookings cannot be refunded at all, which matters for office parties.

The venue asks groups to arrive 10 to 15 minutes before the start time, and a late group still finishes at the original end time. If nobody turns up within 30 minutes of the start, the room can be released and resold. Under-18s are allowed only for daytime bookings and must leave by 6 pm, and ID can be checked at the door. Extensions are sold in 30-minute steps on the night, if the next slot in your room is free.

The skip-it advice is Saturday evening unless the date is fixed. Saturday is the one day the October discount never applies, the venue opens at noon and the big rooms fill with celebrations, and the pavement outside gets crowded at closing time. Thursday is the better night: the same 3 am finish, a calmer start, and Early Saver rates if you finish by 9 pm. Monday closes at 11:30 pm and Sunday at 11 pm, so those suit a short early session.

If Mayfair is fully booked, the sister room on Frith Street in Soho runs on the same booking system and is about a 15-minute walk east across Regent Street, so you can check both venues in one search. If the problem is size rather than availability, a group bigger than 12 is better off splitting across two adjacent Mayfair rooms than squeezing into one, since the capacity limit is enforced.

Arrive early and use the street. Maddox Gallery sits directly opposite the entrance, with contemporary pieces in the windows that are worth a look before you go underground. Walk east to the end of Maddox Street and you reach St George's, Hanover Square, the Georgian church that has hosted society weddings since the 1720s, with Hanover Square itself just beyond.

From there it is a minute or two to Liberty London on Great Marlborough Street, the mock-Tudor department store whose timbered facade is the best-known shopfront in the area. A loop from Maddox Street to the church, past Hanover Square and round to Liberty takes about 20 minutes, and brings you back to the basement steps in time for the 10-minute early arrival the venue asks for.

Karaoke Box Mayfair, at 14 Maddox St, London W1S 1PQ (Basement Level). Nearest Underground: Oxford Circus, with Bond Street also close. Hours: Monday 3 pm to 11:30 pm; Tuesday 3 pm to 1:30 am; Wednesday 3 pm to 1 am; Thursday and Friday 3 pm to 3 am; Saturday 12 pm to 3 am; Sunday 3 pm to 11 pm.

Closed 24, 25 and 26 December and 1 January. Rooms hold 2 to 12 people and are booked online up to three months ahead, with a two-hour minimum and full payment at booking. Food and drink carry a 12.5% service charge, and the cocktail bar closes at 00:30.