I believe Randers Regnskov in Denmark still does it, and if not they at least did it for several years until recently. They have (had) both douroucoulis and several species of callithricines (pygmy marmosets, common marmosets, Goeldi's tamarins, cotton-top tamarins and golden-headed tamarins - most of them at same time) in the South America dome.
I'm pretty sure they have never had any problems.