Photography is my hobby and I have met a lot of people who like the same thing by going to local flickr events. For example, there's a group in Denver that posts events occasionally, often people attend who have point and shoot cameras, no expertise is required
http://www.flickr.com/groups/denver_colorado/ But, if photography isn't your thing try going to Meetup.com and look for events in your area
http://www.meetup.com/find/us/co/denver/ - or you can search by typing in your interest (cars, hiking, bowling, skateboarding, etc) to find other meet ups or people looking to organize something.