Here is my proposed idea, which would look great as a large sign as well as nice on a smaller scale (such as uniforms or apparel.) Simple enough to print and reproduce well, yet very memorable and eyecatching...
I am assuming Gym N Juice is a reference to the Snoop song, and so I gave the logo an edgy, almost thug-like feel. I think this kind of modern logo will appeal to your targeted audience & increase interest.