A number of us went out for snacks and such at the Middlesex Lounge when I was in Cambridge this week for the Business of Community Networking conference. The food was tasty, the beverages were great, and the DJ was (how-do-you-say) "interestingly experimental," but the thing that really caught my eye was the furniture.
Check it out. All the tables were easily movable, and all of the seats were on casters. The room was designed to be reconfigured on the fly. More folks in your party? No problem. Impromptu dance party? No problem.
Although we talk a lot about modularity in software design, this was one of the few times I'd encountered it in the world of atoms.
What else works better when it can be reconfigured at will?