Nearly a dozen local tattoo parlors plan to participate in the industry practice of offering 13-dollar tattoos for Friday the 13th. Ink shops usually have a list of flash tattoos to choose from for the discounted price, but the rules vary from one parlor to the next. Some extend the special through the weekend, and others start a few days early. The shops will probably have long lines, and they operate on a first-come, first-served basis. They also tend to require a seven-dollar tip or setup fee on top of the 13-bucks.