You don't need to become friends with them on Facebook, you have the option of just sending them a message and see if they respond. Other than that, you really don't need to friend them then.
Broadway Shows I've Seen: Hairspray, Chicago, Little Shop of Horrors (2003), The Wedding Singer, Spamalot, Riverdance, Rent, Beauty and the Beast, Spring Awakening, Wicked, Legally Blonde, Phantom of the Opera, Sweet Charity (revival), Drowsy Chaperone, The Lion King, Dreamgirls(2010 Tour).