You’ll find this staple of New York summer at the beach or in parks on hot days. Sellers offer these drinks, and they can vary in how they’re made, but, usually, they’re some mix of vodka, rum, tequila, Everclear or Cognac (or a combination) mixed with fruit juice, and sometimes even candies like Jolly Ranchers. As for how it was invented? It depends on whom you ask, but the origins are likely uptown in the 1990s, with some pointing to José Chu, who worked at Flor de Mayo, a Chino-Latino…