I loved Hair. If you're referring to Penn's Alice's Restaurant oh boy proceed with caution. I love the Arlo Guthrie album of which it was based, but lame flower children hippy commune crap gallore. Hair I thought was an intriguing film that to me embodied the best of what that generation had to offer, and perhaps this is because the film was made several years after the fact, it gave it a while to look at it through a sober camera eye. Plus the actors in question had enough charm and charisma to pull off being "free spirits" rather than just a bunch of loadies saying "far out".