So, I mention two of the networks. Do a search and contact them right away - I think the location changes so you're going to want to know when the next event is. Let me know how you like it--these seem really pretty cool, as it's tough to move in anywhere and feel like you're a part of the crowd. Good luck!
"Favorite" woudl have to be tailored to the company and the reason for going, but loosely I'd have to say Birk's for business and Fibbar McGhees' with friends. Often at TL Beergaden lately, esp when in a divey kind of mood, and because it's really close to my work. The "Colorado Blue" lamb burger there is my all-time favorite burger, anywhere.