How Could a Fitness Center Develop a Sustainable Competitive Advantage

How could a fitness center develop a sustainable competitive advantage over a national chain like Gold's Gym?

A) advertise to health and fitness magazines
B) offer more classes
C) develop relationships with members offering unique work-out programs with assigned instructors recommending specific routines to suit their needs
D) reduce membership fees
E) utilize a computerized database management system to track visitors and out of town guests