>To address your specific scenario, no, you don't need to let them in. You are hosting your own small event at a library that doesn't require purchasing tickets

>To address your specific scenario, no, you don't need to let them in. You are hosting your own small event at a library that doesn't require purchasing tickets, you can boot whoever you want however you want. Esp since the event is for children, I would have no qualms about any adult (who isn't a parent of one of the children attending the event or one of the organizers) just being blanket-denied entry. I.e., using an allow-list instead of a deny-list. And if it's a Drag Reading Hour Gala at the MSG, tickets required for entry and sold online? Or, I don't know, it's an LGBT-themed music festival, with tickets sold openly online. Must I allow homophobes to disrupt a set before kicking them out, or can I kick them out purely on the basis of being members of the LGBT Concert Disrupters group on Facebook?