A community is usually united around a common goal.The best way to unite a community is by service to the Deities and by preaching. Both have to be there. That is the formula Prabhupada gave us: pancaratrika vidhi and bhagavata-vidhi. Both have to be side by side like two tracks of a train. Service to the Deities includes all different departments of the temple as all of those are actually serving the Deities. Glorification of Deities, which is Harinam, includes book distribution, Sunday program and festivals.