One thought is to get involved with outgoing church ministries (eg. soup kitchen visits, trash pickups, etc.) For example, my church has a program where during

One thought is to get involved with outgoing church ministries (eg. soup kitchen visits, trash pickups, etc.) For example, my church has a program where during the summer, we visit impoverished area in our city, gather around in an apartment square (with permission of the apartment owners of course), and teach kids how to read by just reading books with them, playing games, etc. If you're uncomfortable with ministry, you can probably find a community service project without a "hidden agenda." For example, the goal of the above project wasn't to turn the kids into "little christians;" rather the goal was just to keep their literacy skills up during the summer while school isn't in session. As an athiest, by working with a project like that, you'd be able to help do good in the community while still feeling a sense of fellowship with the others. I'm sure the other churchgoers would appreciate the help for the event even though you don't intend on "converting" or whatever.