Looking for great BYOB or other type restuarant for bridal shower?

I am looking to have a bridal shower for my friend in April on a Sunday. I figured Sunday is a great day because many restaurant are closed for lunch and may rent out facility. If restaurant is open, I am looking for place with private room. Is there any great places you can think of preferably on Main Line, Delaware County, Phildelphia (with nearby parking) or outlying suburbs. I am trying to keep the price low on this and would love to do either sit down or Italian buffet with pastas, grilled veggies and an entree. Any suggestions greatly appreciated.