Sunless Tanning

Most of my American friends has a regular schedule for tanning. I am lucky that I already have a tan skin so I don't need to spend a weekly budget for tanning. We all have heard the side effects of tanning booths but for the sake of having those perfect tan that all Americans love, they have to go to a tanning salon to achieve it. Nowadays, there are salons that offer, sunless tanning booth. I really don't know what is the difference of this because I have never been to a tanning salon.