Coined as a gender-neutral substitute for waiter and waitress, this is one of the few words with the gender-neutral suffix -ron to have seen much use, probably re-inforced by rhyming with patron. (Some references instead analyse it as using the same "machinelike" suffix -tron as waitron, but more likely it uses -ron like laundron and like waiter and waitress use -er/-ress not *-ter/*-tress.)