We don't. We tried.
Offering a token 2 or 3 items just got people riled up, because there was no real selection for them.
We have the same problem with non-carb drinks. Over the years, we've had several flavors of juices and soft drinks, though just one or two at a time... even milk, for a while. It just seems that no matter what you do have, they'll ask for something else.
Fruit punch seems to have done better for us than any other single offering, so that's what we have right now.
Here's a song to live by (or at least get a smile out of)
http://www.rodeodrivein.com/pix/junkfoodjunkie.mp3
[This message has been edited by rodeojack (edited May 04, 2006).]