Cathy, this might be too late for you, but... Joy of Cooking has a recipe with a title you might find encouraging: "Lemonade for 100 People." It's on page 45 of my 1975 edition.
On a somewhat smaller scale, but perhaps adaptable for your purposes, I've had great success with making lemonade syrup, also based on Joy's recipe. It ends up as a sort of lemonade concentrate, but tastes far better than the frozen stuff.
Bring to a boil for a couple of minutes: 3/4 C. water, 1 C. honey, 1/4 C. sugar, strips of zest from 2 lemons, pinch of salt. (After the boil, I usually pour it off into a quart Ball jar and drown a few sprigs of lemon verbena in the mix.)
Let it cool down, then add the juice of 6 or 7 lemons. Stir well.
Makes something over 4 cups. Stashed in the fridge, it keeps for weeks. A few tablespoons in a glass topped off with ice or soda water does the trick.
"Why don't you dance with me? I'm not no Limburger."