We were four girlfriends having cocktails around 9pm. Since my birkin is a 35cm, it was too big to put on my chair or table and therefore was on the floor next to my feet. From the security camera, we saw clearly a man putting his coat on the chair of the empty table next to us and spotting my bag. He then left and signaled his partner and rounded back to the table next to us. While standing at the empty table, he managed to kick my bag towards under his table. His partner dropped his coat and grabbed my birkin and his coat at the same time. Both left the next second without any of us noticing.