"AC Rooms" could refer to a few things, depending on the context. Here are a few possibilities:
Rooms with air conditioning: This is the most common meaning, referring to rooms that are equipped with air conditioning systems to control the temperature.
A company or brand name: It could be the name of a company that specializes in air conditioning services or products, or perhaps a hotel or accommodation provider that emphasizes air-conditioned rooms.
A specific type of room: In a specific context, it could refer to a particular category of room, like in a hotel that has "AC Rooms" as a room type.
