In your own room but makesure it's safe and you're surrounded with the other rollers, or a person that's sober? Cause when you rolled, yes sometimes you can think straight but in my case I always took the pill someone offered, and that's dangerous.
You'd feel comfortable in your room, it's not nice if let say you feel depressed and such but you're actually outside (eg ; rave festivals ). In your room when something bad happens, at least you can always have your own bed, your own house for you to feel comfortable with.