I really like 4th Street Live. There is a great mix of restaurants and clubs, and the free concerts are cool.
When the weather is nice, it's great to dine at one of the restaurants with outdoor seating. Most of the places still have a roof, so even if it's raining you can enjoy people watching while munching with your friends.
There are only a few problems with an otherwise awesome complex. You have all these cool restaurants...and then a boring TGIFridays and CVS Pharmacy. I don't really get that, plus there's only one store - Borders. Maybe they could put some fun stores in around there.
You have to check out The Pub. It's a great British pub that has excellent food and drinks, plus a cool interior. There's an "Irish" place a couple doors down, but I don't really see what's Irish about it besides the name.
If you don't like crowds, then go on a week night. It's easy to find parking AND a table!