I think it`s a great idea and would be a lot of fun ... we`re not all husbands or fishermen, but I`ve been to too many "chick" events where it would have been great to take a quick man-break (or have all the guy stuff, including your book, destilled and displayed in a "dudes only" booth).
At tradeshows you can find hospitality suites, but I`ve never seen anything like that at the arts/crafts/etc. things I`ve attended ... you could spin it to where the wife/gal checks him in like a hat (a good woman would do that;~).
It sounds like a good idea to me!
I always leave my husband at home when I go shopping, but I know my Dad goes with my Mom, and he always ends up just sitting on a bench, waiting...and waiting...
He would love a "man" place to hang out.