People belong to a group based on its actions, more than its words. They choose to belong to a group when that group does things that they want to get on board with.
Every group that people belong to outside of church does stuff. Clubs, sports leagues, civic organizations… people join them to do, not to be.
If your church is putting “belong before believe” language in their marketing, you’re missing out on the wonderful opportunity that clubs and organizations are capitalizing on. Because in doing that, you’ve just created “us” and “them.”
In clubs and other organizations, there’s only “us.” And the pitch to join in is always built around the action. If you join in, you belong.
If you want to make people feel more interested in participating in the life of your church – regardless of how much of your theology they believe – just start doing things that make people want to join in, and tell everyone that they’re welcome to join in with you.
If what you’re doing is attractive, then people will join you.