From Las Vegas Boulevard: 

Go west on Desert Inn Road to Jones Blvd.  Turn north on Jones and go 1 mile to Charleston Blvd.  Turn west on Charleston and go a little less than one mile to 6600 W. Charleston, which is a large brick building on the north side of Charleston, just east of the intersection of Charleston and Rainbow (directly east of Lorenzi St.).  We are on the east end of the interior courtyard.  Park in the front, or on the east in any unmarked covered parking spot.