I'm a big believer in "it's easier to ask forgiveness than it is to ask permission." Surely you can find some place to put your bike that is out of the way. Don't talk to the boss, talk to another co-worker and ask if it's ok. I'd just bring it in and use good judgment in a place to put it out of the way and then see if someone tells you can't do it. Seriously, it's a little thing. The only way it's going to be be an issue is if someone complains about it and who would?

J.