Advice for TKTS & 1st Bway show please?

Hello,
I haven't used TKTS for many years, but I am taking a friend to her very first Broadway show (I think it's her 1st theatrical production; she's from a tiny country) next Saturday (25th) so we figured we'd see what's available then.

Questions:
For a Saturday matinee in the summer, how early should we get in line?
What do you think is a good first show for someone (mid-20s)? What good choices might be available? (I did see the 'what was on the boards last week' TDF listing, but I mean considering question #2.)

The friend wanted to see Wicked, but the only tickets left are $150 and that's too much.
Thanks for any help.

Updated On: 6/14/11 at 09:41 PM

I say skip TKTS and use broadwaybox.com. Same discounts, but online. Spares you the long lines and maybe not getting the show you want.

I've found that BroadwayBox usually offers 40% discounts. At TKTS you might be able to score 50% off.

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you could always try to get rush tickets or if you want to take a shot in the dark you can try for the wicked lottery
http://www.playbill.com/celebritybuzz/article/82428-Broadway-Rush-Lottery-and-Standing-Room-Only-Policies

Does one of you have a student ID? That would give you lots of better options to get a cheap ticket.

If you are willing to get up early and stand in line for about 2 hours you could score rush seats for either Sister Act or How To Succeed. Would recommend the latter one - very entertaining show and they sell a lot more rush seats than Sister Act. Get in line directly in front of the theater at about 8 am. They open the Box Office at 10. Don't be intimidated if lots of people show up. They have two shows on Saturday and sell about 50-60 rush seats altogether (maybe even more). Sister Act sells only front row. For both shows it's $30.

Another option is to go to the South Street Seaport TKTS booth on Friday --as they sell Sat. Matinee tickets then. If you don't see what you want there then, you still have an entire day to go to box offices with your printed out Broadway Box or other discounts.