This is pretty awesome, I love the concept. I think team building things like this are super important and it's very frustrating and annoying how cultures change. My group I used to work with for many years, they had parties a few times a year as a way to say thank you to the people who worked with them day in and day out.
Restructuring happened and that group was out, and a new, bigger group came in. All of the parties stopped and the only "thank you" we got was a fucking Costco ice cream sandwich. It was such a slap in the face and along with many other changes, completely ruined the atmosphere of the place and the best people left.
If I ever get back to working in an office setting, I will definitely be doing something like this!