Originally Posted by
Antipode
I'll tip on alcohol, but I avoid getting non-alcoholic beverages because of the whole awkwardness of tip/no-tip thing. Tipping $1 for a small cup of soda seems crazy, but I also feel bad not leaving anything at all, so I just stick with the water that they have out or tea/hot chocolate if I'm not getting alcohol.
I see no difference in service between opening/pouring a soda and a draft beer or wine.