If you're doing an interview, you need conversational tension. After you talk to them, you're not going to have a relationship with them, they're not going to like you, they're not going to be your friend.
The food in the House of Commons is fairly good. The cafe in Portcullis House is really very high quality, and you also have a choice of eating in the more traditional restaurants, the Churchill Room or the Members' Dining Room. I don't often eat in them, though, as I'm usually on the run.