I play in two groups, one on Saturday night, and one on Sunday night. BSing will vary, depending on how strung out everyone is from the week (work, relationships, stress in general)...sometimes, we have more BSing than playing, but often we have good games in any case.
We game from around 4 to midnight...most of us could keep going, or would like to start earlier...but work keeps us from that.
I miss all nighters, and weekend benders...soooo fun...just not so great when everyone has work, or this or that.
And good luck with your behind the scenes action...hehe, sucks when the world ends. ;)
~Nastirith