I was looking at the Builders Plans (the ones with the eraser markings still visible) and I noticed something that I have never noticed, not even in all my time spent on The OBRC, that the smoking room originally had a different layout. It appears Britannic's original concept had no accumulator room and two sets of square bay windows, rather than just the one each side of the ship. The room occupies the are which became the Veranda pantry and the smoke room bar, and the bar appears to be in place of the mens lav., while the lav. has been moved into a section of the Accumulator Room) This concept would have been grand, although quite large for a smoking room. The need for more pantry facilities in the Veranda and Palm Courts is another obvious reason why this arrangement was changed.
Any more insight?