Nice but Affordable Lunch Spots for a Graduation Celebration

What are some nice, but affordable lunch restaurants for a law school graduation?

I graduate from law school on Saturday morning, and my family wants to take me somewhere to celebrate. However, they really are not in a position to spend a lot. So no Pappas Bros., Vic and Anthony's, etc. I have also invited friends who are in their 20's and I want them to be able to participate as well.

Note- the graduation will be downtown. I am thinking maybe El Tiempo or 60 Vines, but I am open to suggestions!

Thank you!