This is such a fun group activity! I'd say it's especially fun for beer lovers, but it's also fun if you don't like beer but you do like solving puzzles. I like both, so I think this tour is awesome.
I've done the tours in Carrboro and Charlotte, and both were great! It's fun to try new bars and new beers. The walking is pretty minimal - enough to warm you up if it's cold, but not so much that you'll overheat when it's warm. I've done the tour in a group of 2 and a group of 5, and it was fun both times. The beer pours were very generous, too!
The puzzle-solving part of this tour is great because it requires you to pay attention to your surroundings as you walk from bar to bar. They also involve some trivia and wordplay. The mysteries of each tour are different, so I'm looking forward to solving the mysteries in Asheville and Durham next!