So I'm planning my wedding menu for this August, and I'd like to serve a homemade soda for those not interested in the craft beers and wine (and open bar). I bought Homemade Soda by Andrew Schloss, but I've noticed that they all use large quantities of inputs for the syrup to mix with the seltzer (ie, there's a syrup:seltzer ratio of 1:1 or akin. Think of it another way, a pint of strawberries might get you 3 servings or soda). I'm trying to serve 80 people, and I'd rather not buy out (and pay for the kitchen staff to prepare) the entire state's supply of oranges, berries, cola, whatever.
Does anyone have any non-alcoholic beverage recipes that are tasty and easier for a crowd? Alton Brown's Celery Soda is one good choice (2 TBSP of Syrup pre cup of Seltzer). Lemonade spritzer perhaps? Are there others that are equally (or even more) delicious?