In England we call these folks Wine Waiters.
Someone who is trained in the serving of wine is a 'sommelier'.
I would call him a drunkard. Or perhaps Wino or Boozer.
A sommelier The role is more specialized and informed than that of a wine waiter.
A sommelier. Pronounced: So-Mo-Yare
bartender
Sommelier
Friend
Waiter(male), waitress(female)
One that serves Chinese food.
A Restaurateur.
res·tau·ra·teur (rstr--tûr) also res·tau·ran·teur(-t-rän-tûr) n. The manager or owner of a restaurant.[French, from restaurer, to restore; see restaurant.]http://www.thefreedictionary.com/restaurateur
A Host or Hostess is the person who meets the guests and shows them to their tables.
soda jerk
Host or Hostess
A person who serves of his or her own free will is officially called a volunteer.
Someone who serves food is called a "waiter" or a "waitress" and sometimes called "staff".
That person is a 'flight attendant'
server aka waiter/waitress
A steward or a stewardess.