allow 4 gallons each tea and lemonade, and offer about 1/4 sugar-free or unsweetened/2 hours. The weather will play a part. Make sure you also have plenty of water to drink. HTH
Iced Tea Syrup Concentrate
20-25 tea bags
6 cups water
2cups granulated sugar
Bring water,sugar and tea to a boil in a large pot (turn off) then steep for 10 min.
Filter and pour into a bottle and keep refrigerated.
Mix 5 parts of water to one part tea syrup concentrate or to your own taste. This makes about 2 gallons of tea (16 cups makes a gallon). 5x6=30
To serve 100-90 people along with beer, wine, punch you will need 3 gallons of tea