1) Counterperson 2) Counter woman 3) Geiger 1) Counterperson 2) Counterwoman 3) Server 4) Someone who attends a counter 5) Waiter 
• (n.) A man who attends at the counter of a shop to sell goods.
Coun'ter·man (koun'tẽr*m a n) noun ; plural Countermen (- m e n). A man who attends at the counter of a shop to sell goods. [ Eng.]
[n] - someone who attends a counter (as in a diner)
a person who waits on customers from behind a counter, as in a cafeteria.