Screw omnis, I say. I never let their choice of diet hamper mine (even if it means being rude/displaying bad manners/offending someone). I've been to restaurants plenty of times and not eaten because the range of vegan food was crap (ie; $5 bowl of lettuce), but have wanted to hang out with people I know (they always feel uncomfortable that I'm not eating.... I don't know why, I sure wouldn't give a rat's arse if they didn't).
A lot of the time I have ordered vegan pizza, omnis with me have wanted to try it (they think it'll be boring), then they love it. Except for the hardcore omnis with attitude problems who still say it's boring.
The best vegan pizza I've ever had is from a small place up in the mountains..... it's on a thin wholemeal crust, and I get it with onion, pineapple, mushroom, tomato, corn and capsicum (all piled on high). It's damn good. They can also put a top over it, so it's like a pie. Now my mouth's watering just thinking of one.