Riddle

I've never left my proper place and know it is beneath the rest I am a beggar girl's disgrace, leave socialites obsessed. Still, split in two I'm not much good; lopsided people often find that dances they once understood need hips that stay aligned. What am I? Just a fun little riddle I wrote. Curious to see if it makes sense to you guys, please post answers. If it suggests nothing to you, don't worry it'll be my fault for writing a bad riddle. If you would like to know the answer then you'll find it stuck on the bottom of my old poem "The Smoke Man"