A.C.T. is San Francisco's Premiere Non-Profit Theater.  

This voucher entitles you to two (2) tickets to any A.C.T. preview performance at the Geary Theater, The Costume Shop theater, or the Theater at the Children's Creativity Museum (subject to availability; excluding Premiere Orchestra seating, performances of Old Hats, and productions at the Strand Theater).

http://www.act-sf.org/