I'll be with my two daughters so I probably won't meet up unless I think it will be a somewhat family friendly event… But here's a few suggestions for those of drinking age.
Flying Saucer: It’s about 10 blocks away from Toyota Center on Main street but it’s a fun casual bar with a couple hundred kinds of beer on tap.
Strip House: This is a steak place maybe 3 blocks from TC on the North side of the Park Shops Mall but it has a small lounge style bar.
Four Seasons hotel: About 2 blocks from TC, one or two cool bars and restaurants in there..
Hilton hotel: Next door to TC, a bar and restaurant on bottom and another really cool bar on top with an amazing view of downtown.
My first suggestion is more casual and the next three are more upscale. I can’t really think of any casual spots that are close to the arena. If you meet early enough the Park Shops Mall will still be open, and there’s a food court in there..