Mezzrow Jazz Club has two options, you can pay to reserve in advance or do a walk-in for $25. I will say that it’s probably worth it to reserve in advance if you care about being in front of the people playing. Since we just did a walk-in they sat us in this weird hallway situation and we couldn’t see the musicians. If you want to do the walk in, get there early. We were there about 30 mins before the set and barely made it in. However the music itself was pretty good. You do have to buy one drink per set (minimum). They also let in all ages not just 21+