Not for nothing, but as someone who doesn't eat meat, I'd never take something like spaghetti and meatballs and pick out the meatballs.
They're in there, in the sauce, that's just beyond gross. I mean if someone is cutting back on red meat to eat less fat or whatever, sure - but I don't know any vegetarians would do that.
If they were cooked and held separately, in a separate pan, that's one thing, but not in the same dish.
I don't run into this type of thing much, but the one fundraising dinner I have seen was entirely meat-based like the ones here, so I didn't bother. I dunno if it's worth it to lure vegetarians, I suppose it depends on the area and how many there are, but doing most of the dishes listed here does cut out a group of potential donors - and plain spaghetti marinara is cheaper.