Thoughts - from actors.

It sounds like this sort of arrangement is halfway between a 'class' and a 'workshop' - I think personally I'd prefer either something quite casual, like an hour-long class or series of classes, for a little less money (say $20) or an all-day workshop for a little more money (say $100-$150). From what you've explained, it sounds like this would suit an all-day format - perhaps a morning session where each person did their screentest with the rest of the group watching, and feedback could be informal with some discussion, and then in the afternoon setting up a more formal audition situation where participants could go into the room separately and film their screentest, and then the group could watch the screentests and discuss improvements. I think something like this could fill a gap in the screen workshop training that is available - mostly it's either long courses or expensive two day workshops. Personally I'd really like to attend something friendly, that gives you a chance to focus purely on screentesting skills rather than getting caught up in screen acting basics that are not necessarily helpful for auditions (hitting your mark etc), acting methods and industry talk. I'd appreciate something that is actually AUDITION practice. It's easy to practice theatre auditions in front of people but getting a camera and practicing a screentest is not so easy. It's also great if you've had some experience of what actually happens with screen auditions in your city - you can give some insight to others from an actor's perspective. Hope that helps. Good on you for being proactive.