Erin's Snug is a solid place on the far east side. I've not only been here for dinner, but this month alone I've been here for two separate private party bookings. One for a rehearsal dinner for my sister's wedding and for a small holiday party for my fiancee's company.
We've always had good service. Food options range from salads, sandwiches, your standard Friday fish fry and even steak. There's also some traditional Irish specialties if your looking to keep it traditional.
Most recently I had the fish fry (portions were huge) and the sirloin entree. Both were good. The drink menu also has a lot of options. Beer on tap, wine, mixed drinks, and martinis to cover a few. Prices on the specialty drinks can add up fast, so just beware if your on a budget.
My fiancee loves the decor including the lanterns and large knight in the corner, and now thinks he's having a knight someday in his house. :) They have a huge bar as you enter, so it's also a great place to just grab drinks or appetizers.
This is a great place for private parties - they have a few room options but would definitely recommend from my experience. I also should mention I've been here on St. Patrick's Day in the past - as you can imagine it is packed and crazy!
Parking is pretty easy and they do offer Badger game shuttles if you are local to the area and looking to head down to the game. And by shuttle I mean the double decker that they have parked outside. We have yet to try it, but know it is an option.