I grew up without AC in Florida.
Sit in the shade with a fan, be still. If in the shade and a breeze, and not moving around, a pretty high temperature is comfortable.
Go to places with cold AC or to cold springs to get cold, it will last awhile after you leave.
If it gets cool at night, open your window at night to let in the cold air, close it in the morning to keep that air in for the morning. But once it heats up inside, you are better off with ventilation - open windows on both sides of the house and run fans, to move air throughout the house.
If it’s dry where you are (it doesn’t work here) get wet and let evaporation cool you. Even here you can get wet and stand naked in front of a fan you will get cold.
STAY HYDRATED.
I guess we could use a little ice age right around now, and it would also be nice to have a Renaissance around the corner.
Someone said inns and taverns, and yes it’s a missing piece of housing here - long term hotels with food, bars/restaurants with rooms to rent above.
Not much though, it is not a time I’d visit.