They'll be honoring their murdered San Francisco chapter president.
Mark Guardado was shot and killed last week in San Francisco's Mission District. Witnesses say he got into an argument and a wrestling match with the shooter, who got away on a motorcycle.
Police say they're looking for Christopher Ablett of Modesto. He's a member of the rival Mongols Motorcycle Club.
A vigil for Guardado is scheduled for tomorrow night at Duggan's Serra Mortuary in Daly City, starting at 7:00.
His funeral will be held at 10:00 a.m. on Monday.