Mormon here
. Mormon church service is seperated into three sections. There is a sermon type service where we also take sacrament. We sing hymns and take care of church business in this part also. Sunday school is generally next with kids seperated into age groups and adults meeting together. We study scripture and have discussions (I think we are doing New Testement right now. I'm not sure, dd has kept me from this part for awhile
.) Last,the kids go to what is called Primary. They sing songs and, although not tradtional evangelical songs, they are songs about Jesus and God and a few about how to behave thrown in for good measure
. They also have a short interactive lesson and then the kids give short talks or recite scriptures. Thats pretty much it. Haven't spent a lot of time at other churchs, so I don't know how that compares to the others.
As for how Mormons view other religions, well, if your worried that Mormons feel about others the way a lot of evangelical christians feel about us (google "mormon" and see the venom) you shouldn't worry. We obviously believe that we're the way to go as far as religions go, but we are taught to love and respect other people and their faith, just as we would want. Not to say there aren't wacko moromons out there, but hopefully they are the exception to the rule.
Good luck to your friend.
p.s. shirt thing is totally NOT mormon.