How many songs can you play from start to finish, every verse and course and when each will be played? Not the words or any lead, but the rhythm playing the chords/notes the song. The average working band has to know at least 30 to play schools, weddings ….. If you want to play taverns or clubs you need 60 to 80. The more the better, it’s kind of like playing lead; you need a lot to draw from. You simply play different songs at a Union Hall party than you do at a Halloween party.
If you know less than 5, do not expect them to hire/except you as a member. More dues to pay before you can play. But go! who knows you might make a contact with one of the other members of the band and jam off and on, or maybe get a call one day because someone remembers you and needs a new guitar player, theirs just left. Might sound strange, but you need to learn to interact with band members, just as much as music.