A church or meetinghouse of the Church of Jesus Christ of Latter-day Saints (the "Mormon" church) is different than a Temple. Here are posts about church meetinghouses, what to expect when you visit a church service, and more:
Temple vs. Church - What's the Difference?
Visiting a Mormon Church:
What should I wear?
What to Expect:
Just a Typical Mormon Sacrament Meeting (Living by Faith)
Just a Typical Mormon Sunday School (Joel and Amos)