The college I work at upgraded the bike parking a couple of years ago, so that there are loads of this this type of rack bolted to concrete. The nice thing about these racks is that you can roll your bike into a wide bay that gives you multiple locking points. I lock my bike every morning out front of my building, and take peaks through the glass doors when I walk by to make sure it's still there.

Elsewhere, I lock to bolted stuff, preferably in line of sight.