I'm currently based at the British Embassy in Manila, and am being seconded to the British Embassy in Bangkok for a couple of months mid September - mid November. I know the Sukhumvit area in Bangkok reasonably well but would be happy to meet up with Bangkok expats on here for drinks, live music etc over the roughly two months I'll be there.
I have to say at the outset I'm not a fan of the girlie bar scene - would much prefer intelligent conversation in a good pub or wine bar and I'm a big fan of live blues music (is Tokyo Joe's on Soi 26 in Sukhumvit still open??). Looking at the various posts here there seems to be a good social network amongst the members here, as there also is at Internations in Manila, and we could certainly do with an expat "singles" theme there as I see you have here!
Anyway, hope to meet a few of you over the next few months.