You should check if all the bills are paid for, especially if there is a conflict with the drunk guest. This is your first and foremost responsibility as an employee. Also, no matter how unreasonable the customer behaves, you ought to remain polite and professional at all times.
If there is an argument or a conflict with a drunk customer then try keeping it private. Addressing the situation in front of other guests can agitate the drunk guest and can make the situation more complicated. It’s important not to let them kill the energy of the space or staff.
Anger is unacceptable in the hospitality industry. If you show your temper towards a customer then it is surely reflected badly on you and your organization. Instead one should act politely and avoid arguing. If the drunk guest is behaving rudely then the last option should be to call the security but try and handle the situation very calmly.
See to that the drunk guest’s valuables are safe like their phone, keys and wallet as drunk customers are easy targets for crooks and pickpockets. And if the guest is female then you have to be more cautious. Make sure that they are taken care of and safely escorted to their travel accommodation and under no circumstances, let a drunk guest get behind the wheel.
Dealing with such situations calmly is an absolute must. Listen and empathize with the guest and if they are misbehaving then let them know in a very calm manner that what they are doing is unacceptable. If you cannot calm them then ask a friend of theirs to try.