Just thought I'd let everyone know this worked for me about a month ago or so. My girlfriend was interviewing with a company in Kentucky and the company booked the room for her. When she checked in, she gave them my HH number and I ended up getting points and miles. Also, when I checked the eFolio, there was nothing under room description.
She did try this again in an interview in Roanoke, but the lady at the front desk told her she didn't think HH points would post because the company that booked the room got a special rate, or something like that. They didn't say "you would not get points because that is not your HH #."
So doesn't hurt to try...