Why don't more dancers use these techniques

I was just thinking I love it when a dancer starts her lapdance a few seconds before the song actually starts playing or when the song goes off she continues to grind on you and asks you "Would you like another one?" I think this is a great technique to either get the guy to buy another dance or to keep him coming back to the club for more. I know some dancers might feel they are only obligated to dance when the song comes on and when it goes off but to me if she is really wanting to have you as her regular customer she wouldn't mind doing little things like this to keep you coming to see her. It is great for both sides. The dancer gets you as a regular customer and the customer is satisfied and feels he has gotten his money's worth, maybe even more than what he expected.