I usually carry a pocket knife everywhere I go. The saying goes, he doesn't carry a pocket knife, is always searching for one.
Also, Denver is safer than some towns. Anyone who really has a problem gets my U-Lock, if they attack me. Otherwise I just avoid conflict like an adult. I'm a big gun fan, (I have a bit of an arsenal) and I could have a concealed carry permit, but I don't want to kill anyone. I haven't needed one yet, so nah, pocket knife works.
Come in my house, different story.