I remember one super Self-Righteous guy talking me into going back to re-attend a Saturday once. I was single. You can probably guess my real motivation for re-attending. But that was the only time I ever did double duty at a DC.
I did that too on a Sunday after having already worked 3 days at one DC. Didn't get me anywhere with the eligible bros though.
I sat there all smug with my notes adding bits to them and leafing through the new litteratra$h before the DO giving the talk announced it with people on the seats around me craning their necks to get a glimpse of it. How pathetic!