Some people learn how to play guitar for the purpose of being able to make it regularly on stage some day. Just having sessions with a live band for in a pizza house is a great accomplishment for some. Some bands that made it to the local music industry came from such live band gigs.
However, perhaps due to the law about paying royalty fees when singing certain songs in public, the live band sessions dwindled. Nothing can stop you from playing in a private gathering, though. With a great stage sax stand and a guitar talent to match, you can have fun playing and maybe earn some on the side.