Living arrangement is different from undergrads. There are no grad common areas. Dialogue needs to happen. Setting is important - there needs to be honesty, accessibility, not too staged. Grad student reluctance and apathy - hard to make community a priority for busy grad students.
Underrepresented students have their own sub-communities.
Sometimes it takes an event to bring students together. Easier to have casual contacts among undergrads but that process isn't initiated for grads. Joint sponsorship is a way to solve that. Joint events that are non-cultural in nature can work. We can do that by having international food booths at big events.