Glorify God with your talents. Be in the world, but not of the world. Paul made tents in addition to being a teacher of the law. Do not cast your pearls before swine- don't play gigs that glorify sinful activities or lifestyles. If the venues are wrong you shouldn't play them- seek other sources of income with your musical talents. These are just some helpful thoughts. God will give you discernment if you ask Him for it.