Lee Reherman's friends and family will pay their respects to the actor in true "Hawk Style" -- as in NO stuffy suits, and lots of time in the sand and his favorite bar.

Sources close to Hawk tell us his celebration of life will start on the beach and make its way to Shellback Tavern in Manhattan Beach, CA.

We're told there's a strict dress code: No suits or dark clothes and outdoor beach clothing is a must. Or as the invitation puts it, "anything that you would wear to party with Lee at the beach!"

As we reported Reherman died mysteriously earlier this week. We're told an autopsy is scheduled for Friday.