Pony club for me has been a great learning experience before joining a more "sophisticated" showing world such as EFA ( Equestrian Federation Australia ). Here, the age group is quite large it varies from seven to people in their twenties and from what I have found the pony club world is more of a female world then males have I have not come across many boys in my travels.
I compete a fair bit through pony club and find it very good and a great learning experience for both me and my horse. I like the way it is set up because you have coaches at the pony club and many other members who are able to offer you a hand when needed, it also depends on the club. Some clubs around here are very catty but I've found the one I go to is lovely and I've made some excellent friends though it.