I'm curious,  for those of us that have to deal with larger seating layouts regularly, how do you approach it?   Do you start a ballroom or convention center layout with a giant rectangle and then start cutting in aisles for fire code etc?  Build it a section at a time?  For that matter which of the three different seating layout tools do you use?   A few times a year I'm doing layouts that max out around 15,000 seats.   This get's to be a special kind of bloated and difficult if you w