A few examples:
Here’s Michael Coles Christmas card of 2009:
Here’s a great example by Michael J Swart:
How can I create such art?
Well Alex Whittles explains how you could accomplish this on his blog:
Besides that it’s cool, a more practical use for spatial data is for example if you’re in the hotel of conference business.
Imagine a report that displays your floor layout and also if a room is occupied or not? Perhaps also to display block-reservations (groups), like for example for SQL Saturday or when your local footbal club is staying at your hotel?