How do you find out about conventions?

Pick a topic you really like or want to know more about. Computers or Star Trek or whatever. Chances are, there’s a group somewhere planning a convention, and Google should lead you to it.

Conventions are organized around specific interests. Like comic books, cars… What are your interests? Google that and convention

What might be a little easier than attending a convention is to find groups organized around your interests a little closer to home.

Have you tried this? http://www.meetup.com/