I recently purchased a first class mileage award ANC-SEA-BZN. I have a multi-hour layover in Seattle and was hoping to use the Seattle Board Room. I understand "A" class tickets (1st class awards) will get me in for the day. However, the SEA-BZN flight is a commuter plane with no first class cabin. Will I either (A) be able to use my 1st class ANC-SEA ticket to get boardroom access in Seattle after de-planing? or (B) will my SEA-BZN ticket show an "A" class booking that will give me boardroom access despite the fact that the segment isn't first class? or (C) will I be shut out and stuck with the huddled masses for hours? or (D) some other combination? Details from experience please. Hopefully the question is clear.