I've patched about 5 innertubes at my desk, but not all at once. Most of the problems I can fix out in the wild pretty quickly, so I don't bother waiting until I get to work to tighten something up or adjust something.
When I get a flat on my way to work, I usually swap the tube out for one of my spares, then patch the punctured one at my desk and put it back on the bike to use the next time I get a flat.