...And having children stuff money into their thongs. Read that again. These lunatics want the kids to do other disgusting things, too; things they won't ask for if one of the parents are around.
Plus, you can just leave the kids there for an hour while you go do stuff that would be 100 times harder with little kids in tow. Trust me, I was VERY annoying as a kid, which my mother can attest to. There is heavy incentive to drop the kids off at drag queen story hour and go do something else.
It's not helping that even the L.A. Times acknowledged these often take place in literal BARS as well as libraries.