We did it this way as well, and it was fine. DH did get interviewed in one of the little rooms, but the questions were all the typical ones (what do you do for a living, where are you staying during your visit, how long are you staying, etc).
He said the interviewer was actually more laid back and friendlier than the usual IO you encounter at the desk. Apparently, in addition to the travel and marriage questions, they talked in great length about growing tomato plants.