If you have a Gmail account you might know about the Google+ Communities. They are essentially groups where people with a similar interest post stuff about the subject of the community. There are thousands of communities on all sorts of subjects.
I've created a Google+ community for L.A. Painters where artists can post images of their paintings and have a dialogue about them. You don't need to be a painter or even from L.A. to join, you can come just to look and respond. The community is new but if it sounds like something you're into spread the word so it can grow.
Here is a recent painting from my Life During Wartime series.