I've got three sleeping 'nests' (pouches?) for my three Sugar Gliders - Piper, Aerrow, and Starling. A cube box nest, an hammock with vine curled in it nest, and this yellow tube-like nest. Most of the time they all use the cube, but sometimes they all use the hammock, or all cram into the small tube. Occasionally each will sleep alone in these three nests - and seem to rotate nests when sleeping alone, or even when they sleep together. Sometimes one will sleep alone while the other two will sleep together - varies a lot.
Piper in tube, Starling in cube, and Aerrow above in hammock
Sometimes when Piper (the mom) goes off on a tear growling and snapping at everything (still a bit protective when in any nest), the other two, dad and daughter, will escape/run out and both go to either separate nests or go to one together... when they sleep separately, it gives me a chance to give one or them a good petting without triggering mom