My approach to live gigs is a little of what others have said. Mine’s not complicated. Folders for “Standards”---my own interpretation of that term. Others for country, Broadway/movie themes/show tunes, older and newer pop tunes. The key is knowing how to find things quickly. I just watch the patrons and wing it. Works most of the time. Trying to rely more on memory, without the use of chord/lyric sheets. Rarely use preset playlists. I’m basically a guitar player, who discovered arrangers a few years back. Seriously thinking about switching to guitar some, using the new 2016 Band In A Box software. Been woodshedding some with it. Some really neat styles. But, won’t give up my two Yamaha arrangers.