Simpson-athon ninja math

Yes the rumors are right!
The MUSC Ninja did strike again. This time for personal entertainment...
[Monday Victoria Day holiday+empty banquet hall + large screen+ many couches+ LCD projector +VCR + several tapes+ speakers+ friends] X [ninja with keys = 11 hrs of Simpsons + snacks + GREAT TIME!]
Definitely to be repeated!

But remember Nothing happened! No evidence of Ninja activity is allowed