Kali-Escrima schools

Hi

I'd rather like to try out Escrima, but I'm not familiar with the organisations/governing bodies and general structure of training - could anybody give an overview?

I'd also like to see if there are any classes near me (I'm in Bracknell, near the Sports Centre, where MAP Meets have been run in the past). I've found a place in Maidenhead, but it looks a bit business-orientated and there's a set monthly DD twice a week fee, which is a bit too rigid for me at this stage.

Thanks!