Is the salary earned from working in a hotel where foreigners who drink alcohol in their rooms and sleep together while unmarried lawful (halal) or unlawful (haram)? And how should unlawful (haram) money be handled?

We hold that the aforementioned work is permissible. As long as the hotel rents rooms for a permissible purpose, there is no sin upon you for the transgressions committed by the tenants, such as drinking alcohol. However, if you assist in lodging a man and an unrelated woman in a room, and you are aware of it, then this is not permissible. But if you are unaware that they are unrelated, then there is no blame upon you.