Is it permissible to work in a clothing store inside a hotel that serves alcohol, knowing that my work is not related to serving it?

There is no objection to renting a shop in a hotel that serves alcoholic beverages, provided that only halal (permissible) items are sold and one avoids sitting in places of disobedience, based on the words of Allah Almighty: "And He has already revealed to you in the Book that when you hear the verses of Allah being denied and ridiculed, do not sit with them until they enter into another conversation" [Quran 4:140], and His words: "O you who have believed, indeed, intoxicants, gambling, [sacrificing on] stone altars [to other than Allah], and divining arrows are but defilement from the work of Satan, so avoid it that you may be successful" [Quran 5:90].

Dealing with those who trade in forbidden things is permissible if the transaction is for something legally permissible, and if the lease contract is not for a forbidden benefit, or if it is not known that the lessee will use the leased property for forbidden purposes.