Although I think the idea of balancing price per night to overhead as the most reasonable explanation.
Consider this....
Occasional binge doper dude looking for a room for the weekend to smoke some meth away from his family. $59 a night at the Motel 6 off the highway or $59 a night at the W downtown. The party grows after he starts boasting about his dope room at the W.
You want that dude next door?
Selective on clientele? Yep. Discrimination on a protected class? No.