STAFF PICK: Forget about circuit training, spot toning, or lots of reps with little pink dumbbells. This is the place where men and women go for serious lifting. World Gym is a temple of iron, where the main focus is on free weights and massive muscles. Don't expect to see UA co-eds in up-the-butt leotards prancing on the stair master, or well-coiffed boys hanging out at the juice bar. Do expect to see serious body builders squatting, deadlifting and curling. Personal training is available, and for anyone who has fantasized about entering the Mr./Mrs. Tucson contest, this is where to start.