When you open the first bed in Revit and view it without textures you will see that the geometry of the bed isn’t smooth, but consists of triangles joined with hard edges:
Do your beds and chair models come from other software than Revit? Unfortunately, it looks that the smoothing information is lost already when a foreign 3D model is imported to Revit: How can I smooth faces at imported models from 3ds Max? - Revit Forum