For the past 20 years, I've been playing weekends with two other guys (two guitars, one bass, and a drum machine). We perform at an assortment of places: clubs, festivals, private parties, even flea markets. Genres include rock, country and standard jazz. The work has been good, but the business end sucks. I, for the most part, have booked the jobs and communicated with clients. Most rock and country musicians I've known over the years are less motivated, are fairly unreliable, have lousy equipment or no equipment at all, and have addictions. In addition, I am a 52 yrs. old male and suffer with tinnitus (ringing ears) in both ears, and I would like to turn down the volume. So, I've decided to make a switch. I purchased a double bass and after some practice, I want to build a standard jazz band. Two decades ago, I played a double bass in symphonic orchestras, stage plays, and small classical groups. Some experience with jazz combos, I gained within those years, but not as much as I'd have liked. I sold that bass when the work with this variety trio took over. Not being one who likes to read charts, I prefer to improvise. I purchased a few books to bone up on scales and chords. By the way, I am also a vocalist, and I wonder just how many double bassists sing? Is there such a breed? Is it possible? Any input in regard to making this change would be welcome.