I've not been to bingo for years, but my friend and I used to go every Sunday night without fail (the big money night!).
I found it easier to do six books at a time, as I knew that every number called had to be marked off, whereas with fewer books, I fretted that I had missed marking off a number.
Once I'd cottoned on to each vertical column related to a set of 10s (i.e. the first column was the solo numbers 1-9, the second was the teens, 10 to 19, third was the twenties, 20 - 30 etc, I found it easy enough to keep up
How I'd manage it now, after about a 10 year gap, I'd not like to guess!
We rarely won anything, and never more than £20 at a time, but as LondonGranny said, it was a night out and a giggle with friends. But crikey, try talking during a calling session, and be very grateful that looks don't kill