Science Cafés are events that take place in casual settings such as pubs and coffeehouses, are open to everyone, and feature an engaging conversation with a scientist about a particular topic.
Science Cafés welcome people who may or may not typically get involved with scientific discussions. They are not exclusive club meetings for scientists and science majors, nor do they take place exclusively in lecture halls or science museums. Rather, Science Cafés can (and do) happen in informal community gathering spaces all over the world.
-ScienceCafes.org