I work with a band like that only with nine pieces. No band stands, but yes, the band players wear coordinated outfits ( singers wear the individual choice but coordinated color wise), and yes, we have music if needed but on IPads. The BL is a middle school teacher and we have use of his band room for rehearsals, runs the business well, and is a good guy. Another plus with the BL, if you are having trouble with a figure on a chart, he can walk you though it.
The deal is, when you get over a certain amount of players on stage, you can't have everybody "jamming" their parts. Having printed music has significant advantages. The first is it takes too long to work out musical conflicts so rehearsals are much more efficient, secondly it provides a standard template so as players come and go, again again getting replacements or subs up to speed faster.
For instance, when I joined, I was given the unbound bass book for the band with at least 75 songs, most of which I never played in my life and one week to become totally proficient. These were very detailed arrangements that you just could not show up and jam through it. I spent 4-5 hours a night, 8 hours on the weekend for that week, to go through the charts to make sure I had all of the difficult figures ironed out and went to the gig book in hand.
The gig was an outdoor community event celebrating the 4th of July. It was a nice warm day and things were going well until the 15 to 20 mph winds came upon us which made controlling sheet music impossible and lost a fair amount of the music that blew into the lake.
Hence the IPad Pro 12" screen with an AirTurn page turner pedal and the forescore app. A bit of an investment, but I'll never lose a chart again.
Anyway, sorry your situation didn't work out. Obviously you've been playing for a long while, but I highly encourage you during this lack of gigs period to learn to read. You don't have to be great at it, but it will greatly increase your marketability as a bassist. It's a great tool to have.