Okay, maybe Porky's isn't the best name for a gym, but you can't argue with the hours. The place never closes. Far from the distractions of sand and surf, a sea of mustard-yellow machines and no-nonsense free weights attracts serious lifters. Photocopies from bodybuilding magazines plaster the walls with stories of champions whom may you may spot in line at the drinking fountain or working the leg press. In the aerobics studio, a suspended wooden floor protects the knees, while the cool blue and cornflower-yellow walls soothe the nerves. And those nerves will need soothing after a Tae-Bo class with competitive fitness pro Maria Bellando or a toning session with onetime Reebok National Aerobic champion Gina Kourany-Aleman. If your limbs ache for a little tenderness, try flexing with the seniors weekday mornings during the Young at Heart workouts, which are taught by health-care professionals from Baptist Hospital. Weekend nights the gym is packed with the club-bound, eager to pump before they primp. In the wee hours, you may have the place to yourself. Just imagine what you and your workout partner could do with soft mats, soft lights, and a whole lot of mirrors. Porky's is open seven days a week, 24 hours a day.