Went there this morning (Sunday 5/12), and got in line around 9:15am (for a 12pm box office opening). I was first in line and got Row A Center Mezzanine, basically smack dab in the middle of the row -- pretty much the best rush seat one could hope for. The two girls behind me got similar seats, not sure about anyone else.
The line was long by the time the box office opened. I wasn't able to count from where I was, but I'd guess there had to be upwards of 40 people there by noon. Most people arrived between 10:15-11:15am, though there was a decent-sized group (I'd guess ~12) there by 10am.
Also, just a random thing for anyone else who goes on Sundays/two show days -- after grabbing my Beetlejuice ticket for the 3pm, I power-walked down a block to Mean Girls and was able to snag one of their last rush tickets for their 7:30pm performance (it was in the back center orchestra, if anyone is wondering). Just something to consider if you're coming in for a two-show day!
Updated On: 5/12/19 at 10:53 PM