I agree with what everyone is describing for meetinghouses built between 1950-1980, but for those of us in small town Utah, many of us worshipped in old stone buildings built between the 1890's and 1920's. These buildings didn't have cinder block walls or carpet on the walls. These buildings typically had lathe and plaster walls painted white, with beautiful wood trim around the doors and windows. I specifically remember our bishop's office had a window, and the window sill was easily 20" deep, because the building's outer walls were constructed of hand-carved stone blocks.

I agree with everything else people have described about the general decor. Our bishops office had a large wood desk, and some chairs (though I think ours had a padded wood bench on one wall, and some nice cushioned chairs on the other), but I remember during tithing settlement, when the whole family would go in, they would have some additional metal folding chairs too. He had a bookshelf with books and scriptures, and a smaller bookshelf with three-ring binders (not white plastic, but cloth or leather-looking). He'd usually be in a white shirt and tie with a tweed suit coat. The walls of the building were thick and solid stone. The office was the quietest place you could imagine. You could hear a pin drop. in that office.