I wouldn't play in a casino if all I had was 100 dollars....
You don't even have a full BI for 1-2.
You are much better of taking that money and sticking it on Merge or Bovada
and playing say 100 dollars worth of MTTs or playing 10NL on a small roll.
You will get more play, real deep stacked play and just more of a poker education.
That being said, if you just are intent on playing, I would play in a 1-2 game on friday or saturday night and hope to quadruple up from some drunk donks or something.