Sydenham Town Forum

I go to gigs at the Hoxton Bar and Kitchen every now and again. It's painfully trendy and I'm generally the only person there over the age of 24...

A little further afield there are monthly auctions at Rosebery's in West Norwood. You can view at the weekend/early week before the auctions, then place a remote bid if you want to.
http://www.roseberys.co.uk/