When people put these ads. in the paper what do most people mean by "Serious Callers Only"? In my local paper there are two ads for Musicians needed, but both say serious callers only. My problem is I don't know if i'm what they would call a serious caller. My job kind of prevents me from practicing in groups that are die hard bands. I would like to join a band just for fun and to just jam with people. So I guess my question is how do you know if you are a the serious caller they they are really looking for? sorry if this seems like a goofy question, but I just don't think im the serious one they need. But then agian I might just be.