Just to echo what everyone has said, most Box Offices will give you a Playbill if you just go up and ask for one. Preferably if you go at a time when they are not busy (It is annoying when there is a line of people waiting to pick up or buy tickets and then someone comes up and asks for a Playbill), so during a show when there isnt much going on the Box Office is the best time. They usually have Playbills in the Box Office, but I have had a few times where rhey don't and have to go into the theater to get one (or they simply say sorry we don't have any). General rule of thumb: if you are polite and considerate they will be polite and considerate back. If you do not live in NY you can write a letter to the stage manager and they will almost always send a Playbill back (sometimes even a signed one, but many theaters have begun asking for a donation for those). But if you just want an unsigned one most if not all will have no problems accomodating that (just remember to include a self-addressed, stamped envelope).