I worked at an event once where it was black or white (short black, long black, flat white, latte) and that was it. Also one size.
No soy, no skim milk, no decaf. Out of serving 1500 coffee probably only turned away 5 people, all on lactose intolerance reasons.
Amazing how many times someone would ask for a skinny, be told that there is no skinny and they didnt really care. Same on decaf.
Sounds like a [s]good[/s] great idea.
If you want something out of the ordinary you should have to wait.
I cant drink cow juice and I dont care waiting for Soy.