I'm sure they don't have to be 18, but it will shut up about 98% of the critics if they have the rule.
The other 2% will complain even if you gave them a million bucks and the cure to cancer.
RUSH: All right, and so anybody can go in and get their haircut?
CALLER: Well, anybody can go in and get their haircut as long as they are male and over the age of 18. We cater to the male population.
RUSH: Well, that's good enough for me.
I thought I heard him say this...