I don't know if this is being culturally dumb, but I didn't know that MERRIWEATHER POST PAVILLION is actually a music festival in the US (Columbia, Maryland).
Here's an excerpt from the about section of the site:
Yes, Jimi Hendrix, Janis Joplin and the Grateful Dead played here! Merriweather Post Pavilion is one of the world's most beautiful and storied amphitheatres – nestled in 40 acres of forest, smack between Washington, D.C. and Baltimore.? If the backstage walls could talk, they’d echo Roger Daltrey and Robert Plant trading some wicked stories about when the Who and Led Zeppelin played here in the ‘70s. Now Animal Collective has ensured its legendary status, by naming its genius CD “Merriweather Post Pavilion” in homage to the band’s favorite venue?