Yes… it's a time management game. You're job is to move customers from station to station and keep them happy until you have their money and they're out the door. Sally will be on her toes as she moves from reception to saunas to facials to massage tables to… well you get the picture.
Your customers loose patience the more they wait so you have to get them from area to area before they get so upset that they leave. Keeping a good eye for depleting hearts (showing how happy they are) and making sure that you don't get to overloaded in bottleneck areas is the key to keeping Sally in the money.