I was in Thailand for 3+ months (Jan to April) and worked in coffee shops and co-working spaces M-F usually 10-5 and never was approached by a girl at a coffee shop. Was my first time outside North America. I had good success dating there on Tinder though! I'd actually get daily matches there, where back in the US I get none. The only issue I had was sometimes the girl I met could type English well, but had trouble with speaking so it was hard to have a convo past hello and how are you when we met in person.
Overall, I've never been to a place where it was easier to meet new people and make new friends. I liked Chiang Mai more than Bangkok, but they're definitely two of my favorite cities ever. Koh Lanta is also a paradise.
I'm planning to go back in January again. The lifestyle there is perfect for me at this point in my life (28 year old web developer).
Some pics from my trip: https://drive.google.com/open?id=0B45Al_n9xsrna25kZ0RFdXBOb0...