The nearest is probably westway (on Thursdays) but the easiest to get to from Kingston if you need to use a bit of public transport is newington (beginners specific session on Tuesdays, but you'd be welcome on Monday and Wednesday sessions too), which is round the corner from Waterloo.
Beaten to it by beagle, although he obviously doesn't know his geography as well as I do ;)
The nearest is probably westway (on Thursdays) but the easiest to get to from Kingston if you need to use a bit of public transport is newington (beginners specific session on Tuesdays, but you'd be welcome on Monday and Wednesday sessions too), which is round the corner from Waterloo.
Beaten to it by beagle, although he obviously doesn't know his geography as well as I do ;)