Yes but to be clear its only quick service, not table
service, and you have to wait in line. So at certain times of the day it could take a along time.
Also if you are using the drink mixes that are for 500 ml bottles you should bring your own bottle and fill it with the water since I think its only a 12 oz glass.
In fact you should have some sort of water bottle any way since you can also fill it with your left over ice from meals and carry it much easier than a cup with a straw. Some even use straws.
In September its still very hot and you will need to drink way more than you think you should.
Though now that is see you are from the south probably already know that.