Since you are vegetarian, I would suggest Seva. It's at 314 E. Liberty, so only a few blocks (0.2 miles) from the venue.
I have eaten there a few times and it is casual and has some good choices. Check the menu out online...sevarestaurant.com
Leslie and I will be there at some point after (maybe before) we get our will-call tickets. Feel free to join us anyone!
I'll check this thread on the way to Ann Arbor in the afternoon, but likely we'll be there around 5:30 pm.

PS it says that Tuesdays are "half price wine" days
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I gave to you my ugly brown coat, you made it pretty when you put it on....