Reds and Commie-symps have always frequented coffeehouses. Leon Trotsky was the poster boy for supercilious intellectuals talking revolution while sipping on an over-priced Brauner. Leftists are the darlings of coffeehouse proprietors, and that's not going to change. You can still enjoy the atmosphere and good cup of coffee--cafes are a great place to read a book or maybe strike up an interesting debate.
Maybe because their opposites frequented the bars...