Cheap theater in DC

After going to Mike Daisey's performance, "How Theater Failed America," at the Woolly Mammoth theater, I decided to test out his claim that theaters are increasing ticket discounts for young audiences (and stretching the definition of "young" in an effort to increase attendance). I am really excited by the discounts I found in DC: 

• Shakespeare Theater Company.  $10 tickets for people under age 35, for all of their performances!  These tickets are available every Thursday, starting at 10:00am, for performances through the following Sunday, by calling STC at 202-547-1122.  More info here. 
• Woolly Mammoth.  $15 tickets for people under age 25, for all performances except opening weekend.  Tickets are available anytime by calling Woolly box office at 202-393-3939.  More info here.
• Kennedy Center.  50% discount off full price for undergrad and graduate students, available through Kennedy box office at 202-467-4600.
• Theater J. Half-price tickets for people under age 25, with their upcoming performance, The Rise and Fall of Annie Hall, at half-price for all under age 35.
• Email listings.  Theaters have cross-promotional discounts.  For example, Woolly emailings this week give $10 discounts for Theater  J and Synetic Theater for all who enter the Woolly promotion code (sign up for Woolly mailings for receive code).

Updated.  Thanks Rebecca.