The Compton Union Building, or CUB as it is known to most, is at the center of the Pullman campus and is the hub for activities that include eating, studying, lounging, watching movies, challenging friends in the bowling alley, or checking out activities associated with student government. The CUB also houses meeting rooms and other student services, as well as a post office, travel agency, copy center, credit union, hair salon, coffee stand, and gift shop.

The CUB is currently closed for remodeling. Opening in 2008, a renewed CUB will serve students in many ways, including wireless internet access, increased student meeting space, an upgraded & relocated home for the Student Book Corporation (Bookie), and a multitude of new vendors. There's more information on the CUB Web site.