(Milwaukie, OR)  --  A 25-year-old Portland man is being held without bail on a murder charge in the death of a co-worker at a strip club.  Clackamas County Sheriff's detectives say Ryan Newman, Jr. is accused of fatally shooting 24-year-old Nathaniel Acosta of Yelm, Washington last Friday at the Gold Club on Southeast McLoughlin (mick-LOFF'-lin) Boulevard.  The investigation shows they were working on a remodeling or construction project at the club when the shooting happened.  Detectives haven't said what led to the shooting.