Because it's under ground, mobile network signals are weak. Ask someone from the karaoke booth (not the bar) for the wi-fi password so you can check-in on Foursquare or Instagram ;)
The song selection is ok, not the best. The user interface is just horrendous, make sure you don't accidently delete the whole playlist you've been building for an hour. With just a random tap.
Whether it's after work with some colleagues, or later with your mates, come to Karaoke Box in the heart of Soho - or our new venue in the heart of the City - for a night you'll be talking about for weeks to come.