that brings us to another set of issue - boy who overstay their welcome. In some bars there are guys who are veterans of almost forgotten soi Twilight and one I saw on my last visit in Atlas I considered too old when he was in Classic Boys at end of soi.
It's quite possible that still have their loyal clients or bars are keeping them as performers in more progressive parts of shows, even simple let them be out of sense of loyalty to devoted employees. Again , it's for bars to decide.
Needs to be said it's two way street. When I visit bars sometimes I say to myself "oh, no, he is still there ? " , specially when boy is kind of pushy and tends to take ownership of their old customer right away . On another hand there are those I'm happy to see back after long absence or would be happy if they actually showed on the stage again. Alex from Moonlight or Oud from Jupiter transplanted there from Tawan are in my mind now
Some of boys age very , very well and stay in shape well past their prime age, others not so with booze and smoke usually being a reason.
Bottom line of all that is that again there are no hard rules in all that bar liturgy. Some veterans are chasing me away by their sight entering the bar but there are those I'd get through a lot of trouble to see them again, even if only to get a hug and handshake