I belong to two ranges, one is a membership at a public range and the other is private and is by invitation only by a member that will vouch for a new member.
The public range says they honor concealed carry guns but request that concealed carry gun remain concealed. Once, while shooting at that range, the air conditioning was a little weak and I took off my concealment shirt, leaving my concealed gun in plain sight. Hey, I was on the range, right? Wrong. If the gun was to be remain holstered in plain sight, it must be unloaded with the slide locked back, or, placed on the shooting bench.
The private club gives the members full run of the place. Open carry, shoot from the holster, do whatever drills you want....safely. First member in becomes the RSO and when he leaves, the next guy becomes the RSO, etc.