Ladies, here is your gym: Treadmills in the front, weights in the back, and no sweaty dudes to kick you off the shoulder press. Sorry, boys. Men aren't allowed at this blink-and-you-miss-it, owner-operated Miami Springs facility, which caters to a client base of competitive female bodybuilders. Founded by 45-year-old former fitness model and personal trainer Mari Redondo, the walls are lined with newspaper cutouts of muscular women in bikinis, flexing at competitions around the state. Inside, you won't catch girls flipping through Vogue or Cosmo while leisurely climbing a step machine. These ladies mean business. Rates are $200 per year, $60 for three months, or $25 for one month. Feel. The. Burn.