Select and session

I'm trying to get a decent design for handling a notion like queues in
Netflix. On Netflix each user can have multiple movie queues. The
user selects the queue he wants to work with from a dropdown at the
top of any page and the entire session is then restricted to that
queue.

It seems clear that something like queue_id would go in the session,
but how would you construct, say, a <select> to map to
session[:queue_id]? Or would you? All of the select builders seem to
want to operate on a member using the dot accessor. I realize I could
cobble something up that maps @object.method to session[:queue_id],
but this feels like I'm fighting Rails. Am I missing something? Is
there a more natural way to go about something like this?

Thanks,
Kevin Donn