The all-important first date. The all-important first impression. Fail here and chances are you'll end with a polite "I'll call you" instead of a spine-tingling game of tonsil hockey. So here's a foolproof plan: A snorkeling trip from John Pennekamp Park. First you have the hour-long Miami-to-Key Largo journey when you can actually talk to your companion to see if they possess any qualities you find vaguely appealing. The park opens at 8:00 a.m., so you also get to see their face as it really is, not through a drunken haze or the overly forgiving nonexistent lighting of a club. Boats depart for Grecian Rocks, a coral reef some five miles offshore, at 9:00 a.m., noon, and 3:00 p.m. daily, and cost $28.95 round trip for adults. Snorkel equipment is offered for $6, making good use of the money test — will she even offer to payç Will he absolutely insist on payingç Once onboard the motor boat comes the shedding of outer clothing layers so you can examine the complete package. Splash around in the crystal-clear waters for an hour and a half and bask in South Florida's glorious weather before heading back to land. All that fun in the sun will no doubt make you hungry, leaving the evening open for a cozy dinner and a cool beer at one of the surrounding casual eateries. A perfect end to a perfect day.