a/the man about town
man-about-town
A fashionable man known for socializing. Although he's been called a man-about-town by the press, he secretly prefers quiet evenings at home.
man about town
a fashionable man who leads a sophisticated life. He prefers a nightclub to a quiet night at home—a man about town. Bob's too much of a man about town to go to a football game.
man about town
A man who frequently attends fashionable social functions, as in Fred is quite the man about town these days. This expression, first recorded in 1734, uses town in the sense of "a sophisticated place" as opposed to rural settings.