Print out and distribute a Soy Happy flyer. Veggie dogs are the obvious alternative to the mainstream baseball fare. Just because someone is opting not to eat meat hot dogs, doesn't mean they shouldn't forego that American tradition.
Veggie dogs are really popular right now.
All you have to do is check your neighborhood grocery store to confirm this fact. Many meat-eaters will tell you that they like the taste of veggie dogs and can barely tell a difference, buying them for their own kitchens. They are the obvious choice. Veggie dogs are the first choice for the reason stated above. By eating a veggie dog, instead of a regular meat hot dog, you get the same taste and experience, without the extra fat, calories or cholesterol, and with plenty of additional protein.