Depends, this gym has alot of potential if your in the right area, and you get your name out in the open. It will attract ALOT of athletes, HS kids, and dad's who want to push their kids to the athletic edge your business, has many angles.
If you know alot about lifting or have ever played college ball, then you might be best naming the gym after yourself for marketing and branding purposes.
Like for instance "Billy Bob's Fitness Center"
Then hire HS kids, that play sports, and open up a traiing camp during the summer, and talk to the coaches.
Bodda Bing
Also these types of gyms are dying out! People are looking for them but falling short, buy cheap good quality equipment little by little over time.
Now that my 2 cents are out of the way....back to names
DA's BootyTundra "Putting the pain in your ass"
Lift-a-Tit
Gettin Jiggy Wit it