I remember rockin' to the James Montgomery Blues Band in my teens at our armory in Putnam, a small mill town (mainly textiles) in Northeast Connecticut, eventually ravaged by "free trade deals." Those were the days--we had FUN!
Armories are actually publicly owned buildings, built with and maintained by public taxes, and which are likely exempt from local property taxes. It seems to me, that armories are the perfect venues for free political speech and public debate, especially when they're taking up taxable space in a community--dollars that could otherwise be spent supporting public schools, another great venue for free political speech and public debate.
Add that idea to the corporatists list for closing public schools: depriving communities of public meeting spaces. Not everybody has an armory, but everybody has (or did have) a public school.