@acer621 -Stretching equipment like the hamstring and hip flexor machines. I've only seen it at a few gyms ever. Also pilates machines. Also stretching classes not just yoga. THEY ARE DIFFERENT!!
-Climbing wall with auto-belay.
-Sign up stations to find a gym buddy already at the gym with similar needs (spotting, tennis, whatever). They get pinged if you have a match.
-Dance classes for men. I'm so sick of dance dying because men don't take part in classes and the lack of pipeline into real dance studios/clubs.
-Gym staff that will spot you instead of just standing around and selling PT.
-Sport specific classes. I'm so sick of gym being divorced from sport. Gym should be to support sports. No one needs to be the best at conditioning for conditioning sake. Advertising for sports teams, dance classes, climbing holidays, hiking holidays etc.
-Gym therapy: sign up with a psychologist that can help you with why you're struggling to go to the gym not just what to do there.
-Nutrition accountability groups, ideally with matching of buddies close to your height weight.
-VR spin/screens with interesting trippy content.