If as a host or hostess you just greet and seat customers, you do not need a service permit. However, if you collect money from customers who have been drinking or ring up checks that include charges for alcohol, you are selling alcohol and need a service permit. If you roam the floor and sometimes help servers by delivering drinks to a table or refilling a customer's glass of wine or beer, you are serving alcohol and need a service permit. Remember, the law says you must have a service permit if you mix, serve, or sell alcohol in any manner.