An "old-fashioned" lemonade
A glass of lemonade with a drinking straw
Lemonade served aboard the Dove
Lemonade was an Earth beverage created from a combination of lemon juice, water, and sugar. It can be served with Ice cubes and mainly served in summertime.
The Hot Dog on a Stick, a 20th century establishment in Los Angeles, specialized in selling hot dogs and fresh lemonade. (VOY: "Future's End")
Q offered William T. Riker a drink when he invited the USS Enterprise-D bridge crew to play a game for him. Moments before Riker sampled the drink, he was thinking about "an old fashioned lemonade", which prompted Q to create some. Q also claimed that it was "an excellent thirst quencher." (TNG: "Hide And Q")
Benjamin Sisko offered his future wife, Jennifer, a glass of lemonade when he first met her at Gilgo Beach in 2354. She refused the offer. (DS9: "Emissary") Benjamin Sisko's son, Jake Sisko, also enjoyed lemonade. It was available on Deep Space 9's replicators. (DS9: "Move Along Home")
While on the Caretaker's array in 2371, the crew of the USS Voyager were offered lemonade and sugar cookies. (VOY: "Caretaker")
Lemonade was served to guests upon their arrival aboard the Dove in 2381. (LD: "Room for Growth")