Do rooms have air conditioning?

There are rooms that offer AC, you can request one. It is usually cool enough at night though.

You don't really need AC there

There are no built-in ac units, not even window-mounted ones. There is usually a large fan one can mount on the window, or ceiling fans. Even in mid-June, temperatures rarely climb above 25°C. If anything, high humidity could be uncomfortable.

The rooms that I have stayed in only had fans, but it gets cool there in the evening