Please - I'm barely interested in my own job, never mind someone elses.
Sometimes my fiance will start talking about his job and I just pretend to listen. If he's talking about boss or co-worker problems then I'll listen, but when he just starts talking about the details of what he's doing when I call or what he did that day I don't know what he's talking about so it's hard for me to really be interested.
That said, I think the tour would be kind of neet.
If you got nothing to bring to the table - don't even bother sitting down.