Here's what rhymes with guesthouses.

Consider these alternatives

motels / self hotels / self bungalows / those bathhouses / glasshouses teahouses / arouses cafes / days ballrooms / storerooms cabarets / days frequented / unfrequented coffeehouses / arouses spas / was chalets / days caravanserais / they campsites / campsite sanatoriums / historians discotheques / whose