I hear what your aying.....Although I can read....I personally NEVER use any fake books, charts, or any music whatsoever on stage it really holds me back from performing in the manner I want to & show better stage presence........it might sound crazy but I was taught to play with a BLINDFOLD ON as a great excercise to play & sing without looking at the keys or reading music/lyrics.....this will Definitly help anyone once you start doing it song by song, day after day try it sometime....
being a slave to the charts is a big hinderence that can be overcome with practice for sure.....plus it allows your music to breath and gioves you the ability to adlib, & improvise which makes for some really fantastic sounding musical playing it your way!!

Good Luck