There are people who like vinyl records -- and then there are the guys behind Hipshaker. Brian Engel and Greg Waletski have been DJ'ing a monthly all-vinyl soul and funk night for the past decade. While most DJs in the Twin Cities bar scene have gone digital -- hooking up a laptop to their turntables -- Engel and Waletski have not only stuck with vinyl, but they'll spin 45s only. The 45, if you'll remember, is the small 7-inch cousin to the traditional vinyl record, typically reserved for singles or short EPs. The name refers to the revolutions per minute. Engel and Waletski, along with a handful of other DJs, are a rare species.