Why do Players clubs change location so much?

I've been meaning to start this thread but didn't have the right motivation. I thought of Terrible, now Silver Sevens. About three years ago the players' club was next to their small convenience store. Then they changed the location to the area between the parking garage elevators and the table games. Now, I guess with the takeover of Silver Sevens, the players' club is where the hotel reception used to be (or maybe they share the same location). But what finally motivated me was Circus Circus. Their players' club used to be in that long hallway leading from the garage parking area to the main casino, almost across from the small convenience store. Then for a couple of years it was just in from the casino front door facing the strip. Now the club is just inside the front door but off to the left against the wall.

I can't remember any earlier locations for these two casinos' players' clubs. The Stratosphere moved theirs from its location next to Roxy's Diner to an area in the main casino next to the front door. Four Queens has had at least two different locations in the past few years. Downtown Grand has changed their players' club location and they haven't even been open a year.

What could possible be occurring that would make casinos want to change their players' club locations so often? Anyone remember any prior locations for the casinos I mentioned? What casino has the record for most players' club relocations?