Just Jamming - Jam Session

In the organizer's words:

Free admission - just join in
Want to MAKE music?
Just like that, just jamming ...
You have an instrument, but it's been sitting in a corner somewhere for ages? Guitar, ukulele, flute, kazoo, saz, rattle or drum? No matter what you have: grab it and bring it along. Acoustic instruments preferred; we don't want to spend a lot of time with the technology, just get straight to it. If you have an electric guitar and a small amplifier, that's fine too.
You don't have an instrument and don't play one? Never mind, singing is also part of it ... And we're sure to have something you can join in with. All you need to bring is a love of music.
And what kind of music? Rock, pop, folk, world music? Yes, something along those lines. Feel free to bring your own ideas.