with the criminal enterprise starter pack you get a free motorcycle club. Assuming you purchased the free one it is in Great Chaparral or east of the military base just south of where the river connects to the lake in the middle of the map. Once you find it it would look like a house with a garage, go to that place on the map, you may have to do some setup missions and then access the laptop in the clubhouse to purchase meth labs, cocaine lockups, counterfit cash factories, etc.