Thanks for all of the tips! For those recommending San Antonio... too late. The trip is booked to Austin. I've been to San Antonio on business and I liked it, but that'll have to be a different trip.
I realize it's oppressively hot in Austin. A man of my carriage doesn't exactly love the heat, but I'll deal with it. I think the weather is a reason I was able to get the flight / hotel at a reasonable price, especially since I only booked a month ago.
We're staying at the Fairmont. We considered some of the cool boutique places (like Van Zandt), but I like some quiet for sleeping and the big behemoth hotels seem to do insulation better. But we plan on getting drinks everywhere.
The real takeaway from all the comments, however, is this is going to be an eating/drinking trip (which is what I assumed) and I picked the wrong time to join a work diet competition!
Happy 4th to all!