Love and redemption. The curse on the brothers is often a central theme, and through love, they seek to break it. The hotel setting brings in themes of hospitality and the idea of a place of refuge. Also, family bonds between the brothers are important as they navigate their cursed state and newfound romances.
I'm not sure of a specific titled 'Cursed Brothers Own a Hotel' romance novel exactly, but generally in this kind of story, the hotel setting allows for a lot of interesting character interactions. Guests come and go, and the brothers have to deal with both the business side and their own cursed situation while falling in love. Maybe look for indie authors who might have explored this unique concept.