STAMFORD — Two patrons were stabbed after a fight erupted at Curley’s Diner early Wednesday morning, leaving blood all over the popular downtown eatery, police said. The incident began after a 27-year-old Stamford man, who was under the influence of alcohol or drugs, came into the restaurant about 1 a.m. and got into an argument with four other patrons who were sitting at a table near him, police said.