Bachelorette Party

I am in the process of planning my bachelorette party for June 16th. Since 1 of my bridesmaids is only 20 years old, I was planning on going out to dinner with everyone and then taking a limo into the city to go to Webster Hall since they are 19 years to enter, 21 to drink on Saturdays. The thing is that admission is free on Saturdays before 11, and then $30 after 11, $20 if you purchase the tickets in advance online.
My question is, if we plan on having the limo pick us up at 10, do you think that leave us enough time to get to Webster Hall before 11 to avoid the admission fee? Any one know if there is usually a really long line on Saturday nights at Webster Hall? Because if so, then we might as well purchase the tickets online in advance if we wont make it before 11 because of long lines. Anyone here have any experience with Webster Hall and how long the line usually is to get in? Thanks.

If the limo picks you up at 10, you might make it into the city by 11 if the restaurant is in nassau county. I don't know how far you are from webster hall to begin with.
I have not been to webster hall since my sophomore year in college, (5 years ago) but from what I remember, the lines started after 10pm.
Can you make dinner for like 7ish, so you could get into the city between 10-10:30? Then you prob would be safe and not have to stand on line.

GOOD LUCK!