Their basic m.o. is for Huppert to seduce some poor shmuck businessman (the first sequence in the film outlines the procedure in way too much detail), slip a Mickey into his drink, then lure him to his hotel room where he passes out.
Reputed for its refinement, considerate service, and attention to detail, the Sofitel's tranquil setting understates the certain je ne sais quoi of this premier hotel.