Where do the older people party?

Just saw a post from someone asking about clubs that are 18+ on the sub. Damn I’m old, but I like to party. LOL. Where are some upscale places that get down? Specifically spots socially acceptable for mid-thirties/early forties.

Can be cocktail lounges, clubs, music halls, I’ll even take a solid LARPing event if that’s where the parties at.

Thanks in advance, Houstonians! New to the area. I love living here!