Is working as a supervisor of cash and currency in five-star hotels that sell alcohol prohibited, even though the work is limited to monitoring the money and those who handle it?

There is no objection to working in the monitoring of money and workers in hotels that sell alcohol, as long as your work is not directly related to the sale of alcohol, because your work is in exchange for a permissible benefit. However, it is better to avoid such places due to their corrupt environment and the mixing of the hotel's permissible and forbidden money.