I'm 43 and partying a lot on a beach in Thailand. I know many other software engineers and testers here who are doing the same, although the climbing around here (Krabi) does compete with our time. One friend works on corporate software while DJing psytrance on the beach.
It's easy to meet expats here (better to have an in, like a hobby you're reasonably good at) and the Thai people are almost invariably polite and genuinely friendly.
Preferably travellers that have shared interests with you - then the barriers of age don't matter nearly as much. Some of my favourite people here are pensioners - pensioners that get out and do stuff.
