If you get claustrophobic at the Hollywood Bowl or Madison Square Garden, then neither of the live music venues I'm about to recommend is for you. The Barfly, above a pub in Camden, is tiny, but that doesn't stop punters from piling through the doors and turning the whole room into a mosh pit. It's a regular staging post for new bands tipped for greatness: Oasis and Coldplay both performed here. But don't let that deter you; other alumni include Blur and the Young Knives. Across the road, the Roundhouse shows it knows the meaning of eclectic, with a program that includes big-name musicians, left-field comedians and even circus acts, in a converted 19th-century steam-engine repair shed.