World Gym caters to the powerlifter set that I think you're seeking -- they provide chalk (iirc) and have multiple squat cages and a deadlift mat and use olympic barbells.
But then...I have yet to go to a gym in San Francisco that didn't have at least one squat rack and space for deadlifts. I don't know where you were going that wasn't properly equipped for strength training.
Let's be honest, that's where the money is. Casual gym goers who will come in twice a week for 30 minutes (and then possibly stop coming, but keep paying) on a Nautilus, followed right away by a nice glass of Jamba Juice. Gym goers who will pay exorbitant amounts of cash for personal training to "strengthen their core".
Some dude who has a high chance of getting himself hurt and who might bust your floors is probably not even worth considering for membership in the big scheme of things. Too much of a hassle.
But then...I have yet to go to a gym in San Francisco that didn't have at least one squat rack and space for deadlifts. I don't know where you were going that wasn't properly equipped for strength training.