Is it permissible for a Muslim to eat in restaurants that sell alcohol, without consuming the forbidden items, and is it permissible for him to promote these restaurants without mentioning alcoholic beverages, knowing that non-Muslims might see the advertisement and drink alcohol?

The basic principle is that a Muslim should not enter restaurants that serve alcoholic beverages, unless he is in need of food, in which case he may buy and leave, and not sit in a place where alcohol is consumed, based on the Almighty's saying: "And He has already revealed to you in the Book that when you hear the verses of Allah disbelieved in and ridiculed, do not sit with them until they enter into another conversation. Indeed, you would then be like them."

If a Muslim is compelled to sit in such a restaurant, he should not sit at a table where alcohol is being served, but at another table. It is important to note that the need is more pressing for a Muslim who does not live in Muslim countries. In such cases, if he enters these places, he must denounce the wrongdoing. If there are no restaurants serving halal food in a certain country, a Muslim is permitted to go to them while advising their owners.

As for promoting such restaurants, it is not permissible, because sitting in them is based on necessity, and there is no necessity for promoting them.