I'm struck by the fact of just how much room my regular bike(s) take up, but my wife's and my Bromptons are nicely tucked along the wall, taking up no more room than a single bike, and in fact less.

My full size bikes of course ride better overall, and I thought of commuting more regularly on them when the weather improves, but now that our new building at work has opened, I'm not sure that's going to work. In the old building, I had a basement office and lab where I could stash my bike and then head up to my administrative office. I still have a lab here in the new building, but my faculty office is on the 3rd floor, and hauling my bike up to it would be very noticeable and likely objectionable. I could put a full size bike in my relocated lab, but it's a much more "public" area than before to go through.

The last resort for the full size bike would be to lock it up outside the entrances: there are lots of new, secure bike racks, but I'm leery of leaving out a full size bike for an extended period of time. I have an old hybrid that I could use and not regret too much if something happened to it, but that sort of defeats the point.

I think in the long run, a folder still works the best: I guess that's why they exist in the first place.