What would be potential concerns with this sort of group?

For many years, the small Midwestern hospital has housed its own laundry services in a building adjacent but not connected to the main hospital. While the laundry supervisor was born and raised in the local town, nearly all the laundry team members immigrated to the United States from Laos in the late 1970s and became naturalized citizens a few years later. A few speak English, but most only understand and speak Lao.
Conrad Petersen, the hospital CEO, badly wants to help the group feel more part of the hospital team. He has invited them to several social functions without success. He has worked with the laundry supervisor, Jill McCurry, to brainstorm ideas, but try as they might the group shows up for work, gets things done, and then goes home at the end of their shift without much interaction with anyone else at the hospital.