There's owners clubs for everything, I went to a small show in Hastings last year that had some nice old classics plus a section for old buses but the biggest surprise was the row of Chrysler PT Cruisers.
http://www.ukcruisers.net/
At the end of the day the help and advice of fellow owners keeps so many cars on the road. Just because most people don't see it as a classic, doesn't mean they don't have a following and a community of like minded people that enjoy getting together.