Our only exprience with the Post Office Cafe was a late lunch on a weekday. We were four and there was only one other table occupied. My sandwich (a pastrami Reuben) was one of the best I have ever had. The rest of our party was well satisfied with the quality of the food and the price which was a tad high but not outrageous.
The waiters (we had 2 of them) were very friendly and joked around without being offensive. In general, we enjoyed ourselves and the food we ate. We want to go back for an evening meal some day and taste the entrees.