Happy's Car Wash in Roseville is now open! Happy's Drive-Thru Car Wash is a growing chain of friendly, drive-thru car wash locations combining the convenience of an express car wash with an emphasis on guest experience. Happy's brings the best retail experience you can remember to the car wash world. Happy's offers free self serve vacuums, as well as monthly unlimited car wash memberships, so you can keep your vehicle clean all year long!