Bull Riders Contest: Saturday* Actor Luke Perry...

Bull Riders Contest: Saturday

* Actor Luke Perry will open the bull riders world championship at 7:30 p.m., Long Beach Arena, 300 E. Ocean Ave. Tickets, $19-$28 (Ticketmaster outlets). (310) 436-3636.

AIDS Dance-A-Thon: Sunday

* A five-hour fund-raiser to help fund services for people with AIDS begins at 5 p.m. Top deejays, celebrities and performers. Food and beverages provided for dancers. Preregistration and $75 in pledges required. Sports Arena, 3939 Figueroa St., Los Angeles. (213) 466-9255.