I can read music, but I try to not let it bother my playing.
I have many songs memorized. I have a stack of books containing charts that I've made over the years. Many nights I never open one, but as Scott says, they are often worth a nice tip or two. They have lyrics with chord names over, or in front of, the words.
I used to use fake books a lot, but not much anymore, because most of them aren't really true to the recordings. I learned to read the lead line from playing trumpet in school.
I plan to get a laptop very soon so the books will be history as soon as I get all the songs transferred. The ones from the past few years are already in computer, but there are still many I have to enter.
DonM