I know for Convention, you can request a specific roommate or you can opt for a single room - and PAY for it yourself. I am one of those who really clicked with my Convention and VLS roommates, keeping in touch thru the years - and requesting we be roommates and the next Convention/VLS! I found them to be very sisterly and considerate of the shared space - more so than a chapter sister probably would be (esp when in college).
In my experience, attendees spend SO much time in workshops/meetings, the time spent in the room is largely SLEEP time. And, because we're not in college, there's no coming in drunk at 3AM with some random boy and waking the roomie.
