I have event creators send me hand drawn photos of the layouts they want for events, quite regularly. I can't be the only one who thinks a simple 2D modeling, layout program within the event set up tab would be useful. Think SketchUp but 2D and make it a simple rectangular room, give ability to put text in locations for easily noting entry points or features of a room, then have a simple catalog of squares, rectangles and circles to signify tables and trash bins, etc.