(Fatwa: 371/349=L)
(1,2) The first tow cases are unlawful since it is helping in sin (which is prohibited) as Allah says:
تعاونوا علی البر والتقوی ولا تعاونوا علی الاثم والعدوان
(3) The only solution to bar is that it is closed and something other is sold instead; since drinking wine is haram and it has been declared impure by the Quran.
(4) If you do not take any thing from bar income then your income will be halal, but if you own the hotel and you gave it freely to someone knowing that he will sell wine there, then you will be sinful according to the verse referred above.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband