M.B.
The boys are usually assigned to a "den" ..... usually it is just the kids in the meeting and the den adult leaders, but that may vary. The kids meet in the den several times a month (once a week, maybe?) and once a month for the "pack" meeting where the different dens get together, sometimes for awards. As they get older, they can do things like hikes, camp-outs, and stuff like that.
Religion doesn't matter.... there is an award that scouts of certain ages can try for that is tied into different religions, and if your child is interested in working on that, you can usually find a sponsor that will help him with it, depending on your den. This link may give some more info about the different religious awards.... but don't worry.... you don't HAVE to work on that award.
http://www.scouting.org/scoutsource/Awards/ReligiousAward...
My daughters were all Girl Scouts, and my son was a Boy Scout, also. He is now 19.
Different families value different types of activities... some are really into sports activities, where we weren't into that so much. I grew up in a Scouting family, as did my husband, so that is the direction we went. This is just another activity where children can learn not only how to get along with others, but how to work together to accomplish things..... all very valuable skills to practice!