operating a plurality of gaming machines each having at least one of a magnetic card reader that accepts a player identification card having a magnetic stripe and a fingerprint reader, wherein each gaming machine enables a user to play a base game, and wherein each gaming machine is selectively enabled to enable {HEAD ~ a rewards qualified user} to play {TAIL ~ one or more system games} 
to play
operating a plurality of gaming machines each having at least one of a magnetic card reader that accepts a player identification card having a magnetic stripe and a fingerprint reader , wherein each gaming machine enables a user to play a base game , and wherein each gaming machine is selectively enabled to enable { HEAD ~ a rewards qualified user } to play { TAIL ~ one or more system games }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL