I'm not sure if this has been posted before but there's a great forum on Reddit called redditgetsdrawn. It's a forum where people are asking for their portraits to be drawn. Of themselves, their babies, their relatives or pets. I always feel compelled once in a while to draw something from there just to keep it fresh and for a little bit of exposure.
Here's the link.https://www.reddit.com/r/redditgetsdrawn/