This certificate can be redeemed for a free party for eight during Cosmic Bowling. Cosmic bowling is hosted by Cooper's Sport Bowl every Friday from 10:30 p.m. - 12:30 a.m. or Saturday from 8:30 - 10:30 p.m. or 11 p.m. - 1. a.m. This would be a great way to celebrate an adult birthday by treating your wife, husband, or significant other to a bowling party. Invite a few friends and have a blast.