I used to ride with other riders but now I only ride alone. A few days ago I went out with a mate at 6am (well, let's just say it's 35 degrees during the day over here) and found it more than annoying. We were just talking all the time. I can't ride on and off, if I go out I have to get into a rhythm and ride non stop for an hour or two. This allows me to do as many moves on a spot as I want and move on when I'm bored.
However, I don't like riding alone because I'm a kind of guy who doesn't like to attract attention. When you're in a group you don't seem to care but if you're just there on your own things are different. That's why I usually ride in big parks. Never go out into the city alone. I'm too self conscious and will only do the moves I have a 100% success rate at - which means no progress, no pushing yourself.