They probably want to goto those new trendy clubs like in Thonglor or whatever, or the emisphere (whatever that is). I feel like I'm too old for those.
The foreigners from a younger generation seek mainstream, quality entertainment and a 'normal' Thai girlfriend. They eschew what the dwindling amount of mongers and sex pats drool over. Possibly after a one-off visit to witness the overpriced fleshpots, walking past the sad-looking, aging Lotharios nursing their Chang's from the front row of Stumble Inn (you know who you are), they're off to where the 'nice' girls are.
And yes, you are probably getting too old for the 'scene' anyway.