I mostly play in a band that comes together for special concerts and society gigs. No originals. We’re all busy with day jobs. I transcribe and chart things, which cuts our prep time in half. We bring on younger musicians and singers, so the line-up changes a bit each time. Tips: One leader to run rehearsal. Politeness and compliments. Shared sense of humor. Shared passion for the details. Shared life circumstances. Thank you’s. These things go a really long way. We also never eat or drink until rehearsal is over.