What was Jimi talking about?

Jimi Hendrix's Spanish Castle Magic is a really great song, but what is it about?
Most people think the song is about getting high, but, it turns out, he's really referring to a club where he used to jam: the Spanish Castle Ballroom. Of course, it's probably a little bit of both. Here's some more info from historylink.org:

"One other notable young Seattle musician who developed a fondness for the Castle was a teenaged guitarist named Jimmy Hendrix. Between 1957 and 1961 Hendrix earned a local reputation for consistently showing up at various gigs and asking if he could sit in and play along. He attempted this with the Wailers, the Dave Lewis Combo, the Playboys, the Adventurers, Dynamics, and other local bands.
Many years after Hendrix had changed his name to “Jimi” and become an international rock star, his father Al would recall that his son would “go to the clubs and ask the guy could he sit in with him. He used to do that right here in Seattle when he was coming up. He used to go to the place on Old [Highway] 99, the dancehall, the Spanish Castle. He used to go there and hang around the stage and try to get in and play with some of the groups.”

You can read more history of the Spanish Castle here.

If you don't already have it, grab this song on iTunes, from the amazing album Axis: Bold as Love, here.