Cafe Mulatte (2000 W. 18th St.; no phone yet), a counter-service spot in Pilsen near the National Museum of Mexican Art, will serve sandwiches such as meatball, ham, egg, and tuna, and the space upstairs will show artwork. ???We want to create an atmosphere where everyone feels comfortable and joyful,??? says Mandujano, an immigrant from the Mexican state of Guanajuato.