WEEKEND WARRIORS

Spending one’s downtime racing stock cars or playing polo still carries cachet, but the latest hip avocation is racing those superfast boats. Chuck Norris has been doing it for some years, and apparently so has Don Johnson. Johnson joined Stefano Casiraghi--Princess Caroline of Monaco’s husband--among the prize winners at the 1988 Key West Offshore World Cup boat race. Johnson finished second in the superboat class, helming a 46-footer borrowed from the race’s winner, Tom Gentry, a Honolulu real estate developer. “I’m here to race, not to be an actor,” said Johnson, who was mobbed by fans. He raced, all right, but Casiraghi won the open class, averaging 93.077 m.p.h. in an Italian V-hull boat with four 600-horsepower diesel engines.