carhop - a waiter at a drive-in restaurant

counterman, counterperson, counterwoman - someone who attends a counter (as in a diner)

dining-room attendant, restaurant attendant - someone employed to provide service in a dining room

sommelier, wine steward, wine waiter - a waiter who manages wine service in a hotel or restaurant

waitress - a woman waiter

human, individual, mortal, person, somebody, someone, soul - a human being; "there was too much for one person to do"

lurcher, lurker, skulker - someone waiting in concealment