The Black Dog Ballroom has every you need to get your night started right: rooftop bar? Check. Private karaoke booths and a chill, night-clubby basement bar? You got it. This spot scores bonus points too for offering great happy hour deals every Friday night from 5pm til party o'clock (read: all night long). Get Prosecco for 12 quid, champagne for 30, and select cocktails for four. Score!