A few years ago, I separated my car key + remote entry fob from the rest of my key ring. I didn't want the extra weight hanging off the ignition switch while driving. (Interestingly enough, this is GM's "fix" for their ignition switch problem.)
The point is, I only have a few non-car keys on my secondary key ring, so this little key folder might have enough space to accomodate the non-car keys.