Here in San Francisco we have a bonsai society and even a bonsai museum. They would host periodical bonsai exhibits. I am not originally a fan of bonsai but after attending these shows, I was amazed and found them to be exquisite.
And the community is very strong, friendly, and supportive. They encouraged me to get involved and gave me a detailed tour of the trees. I recommend you look for a local bonsai club.
Noah