Earth, an alluring enigma, is balanced in the void of space upon two poles over which it sensuously spins and ineffably shimmies. Harness the power of your polarity with today's Groupon to Dance Alley. Choose from the following options:

• For $10, you get a drop-in fitness pole-dancing class (a $20 value).
• For $47, you get five fitness pole-dancing classes (a $95 value).
• For $90, you get 10 fitness pole-dancing classes (a $180 value).

The teachers at Dance Alley tone up body image and self-confidence while building muscle strength and cardiovascular endurance with a mix of moves culled from Pilates, yoga, belly dance, and pole fitness. Bright green walls give pole pupils pep talks as the vertical vixens twist in the air to increase their strength, agility, and flexibility while getting in a cardio workout. Beginner, intermediate, and advanced pole-dancing curriculums allow sirens of all levels to whirl into fitness, an increased sense of sass, and underground firehouses. The five- or 10-class package lets students step into a series of level-appropriate courses, while dropping into a single class gives an aspiring fitness flirt a chance to see if pole-dance is right for her.