Our Club throws steel shot...
We started offering (3) 100 singles programs (targets-only) a few years ago. We've advertised that Handicap may be available, if we can meet minimum participation... we usually do. I do not recall ever throwing doubles.
Through our annual "singles" leagues, we continue to offer the opportunity to register those 400 (8 wks x 50) targets to our existing ATA members, while using the league as an additional recruiting tool to introduce non-ATA recreational shooters to ATA programming... we pickup a few new ATA members every year.
Never have offered the Big50 mid-week, but many club have success with those also...
Like Nike says - "Just Do It!"