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