Chris, this will be held in a room and I think the lights out is a great idea!  I believe this talk may just be an intro into a whole bunch of other material.
Excellent comments by ya-all!   I'd be glad to buy a couple of pitchers of beer or half-gallons of "round" ice cream, (two things very close to my heart- don't you know) for you, if I could figure out a way.  As it is you will have to be satisfied buy my virtual "well done".  
But any way we could have a beer or ice cream icon?  
Tim H. :-)