Being single, I have some preferred restaurants to eat out, always eating at the bar section.
On occasion, the bartenders had a cold, I draw the line where they sneeze in their hand...then proceed to make more drinks.
Once after having them remake my drink, had to talk to mgr, and he took him/her off duty.

If its just an odd sneeze, and they catch it on their elbow...no problem.
But can only let things go so far.