Capitalizing on the constraints of lunch hours to learn new things! - http://en.wikipedia.org/wiki/Brown_bag_seminar
A brown bag seminar, session or lunch is generally a training or information session during a lunch break. "Brown bag" is representative of meals brought along by the attendees, or provided by the host. In the USA, those are often packed in brown paper bags. Brown bag seminars normally run an hour or two.
The name of this event is inspired from http://www.paulgraham.com/hp.html
When I finished grad school in computer science I went to art school to study painting. A lot of people seemed surprised that someone interested in computers would also be interested in painting. They seemed to think that hacking and painting were very different kinds of work-- that hacking was cold, precise, and methodical, and that painting was the frenzied expression of some primal urge.
Both of these images are wrong. Hacking and painting have a lot in common. In fact, of all the different types of people I've known, hackers and painters are among the most alike.
What hackers and painters have in common is that they're both makers. Along with composers, architects, and writers, what hackers and painters are trying to do is make good things. They're not doing research per se, though if in the course of trying to make good things they discover some new technique, so much the better.