I have a friend who is a chiropractor with a digital (very low radiation) x-ray machine. He allowed me to take several fun xrays for marketing.
One year I had a large booth at a convention called Tattoo Fest. I was able to hire other therapists to work the booth with me. (No way I could do all four long days by myself!)
We promoted massage to the artists as well as prospective tattoo clients. It was a blast.