I was in Wig Lounge early in the morning. It was very quiet. The lounge is very peaceful; the ceiling is about normal height, maybe a bit lower. Carpeted floors, a lot of chairs, and few windows. I stood with the balloon about 3 feet from the microphone, which was sitting on the table.
30 dB decay: 0.384 seconds
50 dB decay: 1.194666 seconds
60 dB decay: N/A
decay to background level: 1.205333 seconds