Given what we know about covid, why should I believe that sitting in a room with 30 people outside my family counts as “nominal” risk? Then repeat for 4 more groups. It’s a large gathering, extended time, indoor, poorly masked, poorly distanced, and poorly ventilated. What transmission risk factor are we missing?
Your indoor youth club houses probably contribute to community spread by having one asymptomatic youth transfer the virus to another asymptomatic youth. Unless you have awesome contact tracing, which you don’t, you do not know whether kids got covid at the youth center and brought it home to grandma.
Sad thing is, the same program held outdoors was actually pretty safe.