Attractive women in Thailand who want to make themselves available to the general male public typically work in a bar. It's rare to see them on the street in working Thailand, apart from visits to night markets, festivals, etc.
Foreign men love Isaan women because they love white skin, they are highly affectionate, they are happy to be by your side 24/7, and the region of Thailand is cheap and spacious. Still, the truth is that most men end up with Thai divorcees, moms whose kids have grown up. Scooping up the leftovers is more socially acceptable than chasing 18 year olds, and maturity often tempers avariciousness in women whose looks are fading.