I play a lot of hide-and-seek with my 10 year-old son, so here are some furniture-related hiding places for a person to hide in:
Closets (to include shelves within the closets) and especially closets with clothes in them.
Bathtubs (behind the curtains)
Behind doors
Behind curtains
Under tables (especially if they have tablespreads to conceal what's under them).
If you can get your character to go prone that would open up more hiding places:
Wedged between a couch and the wall
Under the bed
Underneath a pile of laundry
Inside a large box or suitcase
Hope this helps!