Is it permissible for a hotel owner to make all satellite channels available, including MBC, which broadcasts indecent scenes? And does he incur sin if guests watch them, knowing that most guests stipulate the availability of this channel?

You must remove the forbidden channels from the hotel apartments you own, as you are able to control them. This falls under the command of good and the prohibition of evil, cooperation in righteousness and piety, and avoiding cooperation in sin and aggression.