English music session lunchtime, first Sunday monthly. The Horseshoe, Melior Street, SE1 It's about 3 streets away from The George

Cajun music session in the bar of Cecil Sharp House 1st Friday monthly approx 7:30 - 9:00 (A live Cajun band comes on upstairs at 9, if you stay you have to pay for that of course, but there is a discount with your NUS card)

The House has the most reasonably priced beer I have found in London.