Subway is offering free sub sandwiches for life to the first person who gets a footlong tattoo on their torso during the store’s Las Vegas block party on Wednesday, July 27. The first person to get a 12″ by 12″ tattoo of the new Subway Series promotion’s logo on their torso or back will win $50,000 worth of gift cards. Subway is also offering smaller prizes for people who get smaller tattoos of the logo during the event running from 11 a.m. to 5 p.m. PT. Those who opt to get 3″ by 3″ tattoos on their forearm, calf or shoulder blade will get free sandwiches for a year awarded in $4,380 worth of…