Dead and Breakfast (2004)

A group of friends on the way to a wedding stop in a small town for the night and wake to find their hosts dead.  While the sheriff takes their keys to keep them from leaving town, one of the group opens a box containing an evil spirit who starts killing and resurrecting townspeople as zombies.  The group ends up holed up in the B&B, fighting off zombies and trying to figure out how to get out of town.