Walking distance you are pretty much confined to the 16th St. Mall, REI, Mile High Stadium and Coors field. If you want to go shooting, there's a good spot up on Highway 72 that many people use that I can give you directions to. There's an indoor range in Aurora that rents guns also.

Lots of good restaurants and bars, and microbreweries. Some have web cams so your spouse can check up on you, though.