You should be ok for getting a standing room slot if you're there an hour before they start selling them (so in line at 5 for an 8pm show...though on weekends you might need to be there a little earlier).
There are no guarantees about getting a seat...and then it's at the discretion of the ushers AFTER intermission.
Experience live theater. Experience paintings. Experience books. Live, look and listen like artists! ~ imaginethis
LIVE THAT LESSON!!!!!!