The incident happened early Friday morning on the front patio of a restaurant in southeast Burnaby.
Police say a 23-year-old man was hit with gunshots several times in the legs and was taken to hospital with serious, but not life-threatening injures.
No one else was injured by the flying bullets.
A group of males believed to be involved were seen running from the area.
RCMP Staff Sgt. Maj. John Buis says they don't think the shooting was a random act, but those involved aren't co-operating in the investigation so they hope witnesses or other members of the public will step forward with some information.