I'm not sure how many spots are in your house, but we have a suite that holds 16 people that we have to fill (total is 60).
What we do to ensure most of the suite is full, is
1) all council members are required to live in the suite. Which fills the suite, and also makes them more efficient officers sometimes- easier to get in touch with
2) social and house manager have to live there.
These are in our bylaws. There's 9 on council, so that leaves only a few spots. A lot of our newer members want to live in the suite. Also many times seniors live in our suite, because on our campus you're only guaranteed on campus housing for 3 years. So in lieu of moving off campus, they just live in the suite.
It comes and goes though. Some years everyone wants to live in the suite, other times people don't. After a year where everyone who lives there and gets along and has fun, everyone else wants to live there. If people don't get along, no one wants to live there the next year.
I loved living there, always being near the action, always knowing what was going on,and ALWAYS having someone around to hang out with. Make it seem as fun as possible, because it is!