I don't, but quite few do round here (I'm on SE coast). I know a girl who runs evening groups and my BIL does it with fire. I'm hoping he'll teach my DD a bit of poi as I do African drumming and it'd be a fun thing to do together.
I didn't think of juggling clubs, I'll have a look. I've been trying to find spinning clubs too but that's not working I'm planning on going to the climbing club based at Essex Uni once my OH moves down here too so I'm hoping to find some spinners there (I've found that 'extreme' sports people tend to enjoy spinning of some kind!)
Problem with the festivals is that I'll be back at PGL next year, so though I'm keeping fingers crossed for spinners there (there usually are a few), I won't be able to attend festivals. Hoping that I'll be back in the UK in time for Summer Solstice and a trip to Avesbury though!