That's great!

I will sometimes ride around a parking lot trying to do the no hands thing while I am waiting for people to show up for a ride. I also do some drills with people I am working with if we're going to do an event that has a potential for close contact riding or bumping. That really improves pack rding skills as well. (For those drills you need another person, a grassy area and sneakers...)

Another fun thing to do (if it is safe and no cars coming) while you're waiting for someone on the road is make as tight circles as you can in the road without stepping down. You could do that at your car park, too, but on the road you can't cheat at all if your circle's not tight enough!