I agree with Beryl.. either a Triple or Quad room, or a Mini-Suite..Our Best Buds for cruising do this on the occasion with their 16 year old DD ..she is a slender thing but it still does get smooshy..she sleeps in the Queen size Sofa fold out bed in the Mini-suite.. but as for a regular balcony..it's a no-no unless it's a true designated Triple or Quad.. it's the only way to "add a 3rd passenger".. to the stateroom..Happy Cruising!! Joanne