Clubbing Problem Solved

Here’s an idea for a product that would improve clubbing:

A little light that girls would put on their lower backs when they go clubbing. If the light is green is means they want to be grinded with. If the light is yellow it means it depends if you’re hot or not. If the light is red it means please don’t dance with me. Girls could have a little controller that clips on to their front so they can switch the setting whenever they want. It could be called STOPLIGHT.

Thoughts?