You very rarely see someone asked for ID and if so, it's always done in a swift and courteous manner without any fuss. They want people to play.
I was ID'd at a BJ table at the Hooters on my first (and only) visit there, aged 36... Wonderfully embarrassing for the Hooters girl when I turned out to be older than all the others at the table. Needless to say, I loved it so I stayed until she'd taken all my money. But I left with a smile