Perhaps you do the Sheraton after complaining that your Schnitzel or Leberkäs is undercooked and thus you cannot fly on the same day, so then LH must book you a room at the Kempinski, and then demand that since it is only a day room they must book you a suite at the Sheraton for the night. You can then arrive back at the FCT at 0530 for the following day's flight and repeat the enhancement process.