Yea 40 probably is tops but thats only special cases, most already age out by that time honestly. Some might move around the club and be hookah girl or bartender but most keep it moving. I remember back in day there was a 38 year old and she would talk about how she a grandma and still look good.. She did but most of her custos were older cats who maybe had prior relationships, dudes like Lawrence Taylor and shyt, sliding thru after golfing..
I would say by 35 most of them are gone tho, smart ones before 30, probably way before. That industry is like Running back status..