Why would that be weird? In addition to robots, other entities which are not allowed to buy a ticket to watch a movie include tigers, elephants, tardigrades, tarantulas, seagulls, ants, pelicans, dolphins…
If a dolphin, a tiger, and an elephant walked up to a cinema ticket office, handed over some money, and said they wanted a ticket, it would be interesting to see how the cashier responds.
Ants may not be taken seriously if they were to offer to pay, but then again nobody will stop them just walking in to a theatre without a ticket either.
