Only during the winter and when it's cold out. Otherwise, I sleep in my underwear. Plus, not some crazy person who thinks it's OK to wear them in PUBLIC.
I'm pretty much in my pyjamas all the time except for when I go to school or out. When I go to my friends house I bring my pyjamas to change into. I wouldn't wear them out in public though, that's ratchet.
Otherwise, forgetaboutit! ; )