2 level reception area- need advice

Hi all! We have our ceremony and reception venue booked. The ceremony and reception area has 2 levels. It is a grand ballroom with high ceilings, a marble dance floor, and a beautiful staircase that leads up to the second floor. The second floor is completely open with a railing all around that overlooks the lower level. Each level has it's own bar, bathroom, etc. It's beautiful, but we are going back and forth on how to figure out seating. The ceremony seating is not an issue, as we can fit all 200 guests comfortably together on the lower floor. However, when they flip the room for dinner, that number becomes 150 because of fitting the actual tables. We originally thought we would put our friends at the tables on the upper level. Here was our reasoning- our friends are going to be partying and dancing no matter where they are sitting. Cont’d in comments.