Mark Mahoney is a Boston based tattoo artist. He owns Shamrock Social Club on Sunset Blvd in Hollywood. He started tattooing in 1997 in Boston, Mass, a place which at the time had made tattooing illegal. He is considered one of founding fathers of black and grey art with a single needle, and is most known for his images of religious icons and old school collages. His list of celebrity clients include Mickey Roarke and Johnny Depp.