ticket collector(n = noun.person) ticket taker - someone who is paid to admit only those who have purchased tickets;
is a kind of door guard, doorkeeper, doorman, gatekeeper, hall porter, ostiary, porter

airplane ticket, bill collector, book collector, bus ticket, butterfly collector, coin collector, collector, collector of internal revenue, commutation ticket, garbage collector, just the ticket, meal ticket, parking ticket, pawn ticket, pinwheel wind collector, plane ticket, railroad ticket, refuse collector, rent collector, return ticket, round-trip ticket, season ticket, solar collector, speeding ticket, split ticket, stamp collector, straight ticket, tax collector, theater ticket, theatre ticket, ticket, ticket agent, ticket book, ticket booth, ticket holder, ticket line, ticket office, ticket stub, ticket taker, ticket tout, ticket window, toll collector, train ticket, tyburn ticket