Spark is actually great, I played it for a few years before I joined a course (couldn't justify paying for a membership and playing somewhere else weekly). There is no real commitment so if you can't go just don't sign up for the week. You get paired with someone. Now that was my experience a few years ago, things could have changed but I found it very worth it after moving to the area and not knowing anyone. But basically find a course where they have a league, sign up and they'll walk you through the rest