In my group that would use it (a college fraternity), we'd definitely be up for putting in the effort for this (lots of utility derived from trash talking, etc). I cannot imagine, however, that we'd pay $15/month for it.

A related website http://athleague.com/ (runs our school's IM sports) has options to purchase team paraphernalia or related things through their websites. As a college student, I can't say I know much about how that would be monetized in an office setting.