Here we go again. Just like the rabble-rousing “Waiver Wars” of the mid 80s — union meetings, passionate and heated rhetoric, mano-a-mano infighting — all about the well-being, membership, management, and dare I say, survival, of Los Angeles’s vital 99 seat theater scene. Check it out. As of this writing, there are 5834 members of a closed Facebook group called “Pro99”, created by 24th Street Theatre’s Jay McAdams and stating: “Pro99 is a community group who supports preserving 99-seat theatre in Los Angeles.” (www.facebook.com/groups/348992575287472/). It’s a big deal in this town, run primarily by the film and television entertainment industry,…