Go east rather than west for nightlife
Even though there are loads of bars around Piccadilly Circus and Soho in the West End, you should check out some of areas east of the city for bars like Shoreditch and Hoxton. Bars mentioned in the video are:
Big Chill Bar (Dray Walk, off Brick Lane; Tube Liverpool Street, Aldgate East): One of London's coolest bars and has different DJs every night of the week.
Jam and Kick Near the corner of Shoreditch High Street and Old Street and always busy on weekends.
Bluu (1 Hoxton Square; Tube: Old St): On the site of the old Blue Note jazz club and the best bar around Hoxton Square.