Does auditing the accounts and financial records of a hotel that has a small bar serving halal drinks and intoxicants, with no revenue from the bar entering the income of the hotel owner, make this work unlawful?

The work of a chartered accountant is permissible, and it is a type of joint hire (ijarah mushtaraka). A condition for its permissibility is that the contracted benefit must not be unlawful, such as accounting for usury or gambling. Therefore, reviewing the accounts of the aforementioned fund is permissible, as long as it does not include accounts related to alcohol or gambling. The presence of a bar in the hotel does not cause harm if the bar's proceeds from selling alcohol are not part of the accounts the accountant is working on.