Born in Water Town, New York Guinan lives in Chicago. He paints in the American realistic tradition in a style that dates back to the 19th century. His themes, for example, the night scenes in bars, remind us of Edward Hopper. But while Hopper's characters seem stereotypical, Guinan's people are protrayed as individuals. Most of these men and women are losers. Through his sensitive painting, these lost men and women have their dignity restored. He exhibited for the first time in Europe at the Basel Fair in 1972. In 1973 he had his first one-person exhibition at Galerie Albert Loeb, in Paris. In 1982: Venice Biennale (International Pavillion). In 1989 he exhibited in Chicago (Galerie Albert Loeb) at the Chicago International Art Exposition.