MIAMI BEACH, Fla.—Florida’s famed South Beach is desperately seeking a new image. With more than 1,000 arrests and nearly 100 gun seizures already during this year’s spring break season, officials are thinking it may finally be time to cleanse the neighborhood of its law-breaking, party-all-night vibe. The move comes after years of increasingly stringent measures—banning alcohol from beaches, canceling concerts and food festivals—have failed to stop the city from being overrun with out-of-control parties and anything-goes antics. This weekend alone, spring breakers and pandemic-weary tourists drawn by Florida’s loose virus-control rules gathered by the thousands along famed Ocean Drive, at times breaking into street fights, destroying restaurant property, and causing several dangerous stampedes. The situation got so out of hand that Miami Beach Police brought in SWAT teams to disperse pepper bullets and called in law enforcement officers from at least four other agencies. Ultimately, the city decided to order …