With the combination of Flirty Girl Fitness®, Zumba® and Pole®,  The Underground Fitness Club, Inc. offers women over the age of 18 a high-impact total body workout in which strength, endurance and flexibility are trained in an intensive but fun new exciting way! Feel free to browse around.  But remember this is a private club, for members only.  Most information is kept confidential until you have become a member of The Underground.

“The Underground is more than a gym but its a soul experience” ...Vicky

“They are doing such a great job at the Underground, you can really see they are putting their heart and soul into it.”...Heidi

“I absolutely adore Flirty Girl Fitness for their empowering classes to women of all ages and sizes and defiance of stereotypes' of what makes a woman sexy, kudos to you for finally bringing something sassy to McHenry county!” ..Misty

Because  YOU deserve to feel sexy!

“OMG! Get to the Underground!!!  I’ve never had so much fun working out - everyone is cool, there’s POLES, the sound system rocks!  If you’ve been intrigued by the pole fitness craze you’ve heard so much about or are just looking for a safe, FUN place to work out - LOOK NO FURTHER!  Check the schedule - there will also be Kickboxing, dance, crazy, creative fitness and more!!!  (The Underground now holds my personal record for most sessions consistently attended without getting bored, distracted or pissed off with working out!)  Also no boys allowed - Ha Ha  .....Shawn

I am having the time of my life! All of the instructors and my fellow Zumba Queens and Booty Busters are amazing.  To have so many awesome people in the same room at the same time is just such a wonderful experience.  We are all different ages and sizes but yet there is such a sense of togetherness while we are doing our work outs.  I absolutely love it, I haven’t had this much fun exercising since Dodge Ball in the 4th grade! ...Rose