Catering for a more affluent clientèle than your average karaoke bar, Cousin Jill's is an upmarket sort of retreat in the heart of Mayfair. This place has been open forever and is popular with company outings and big birthday bashes thanks to the cool decor and refined setting. It's still karaoke, though, so don't expect to retain your dignity...

Cousin Jill's offers a choice between hiring smart little booths like 'The Snug', all decked out in ottoman rugs and pillows, or renting out the whole place for an office party.

If you're on your way to Jill's, start practising.