-As a practicing Muslim, I find it a little issue in terms of food. Since this is a multinational setting, sometimes a colleague invite us to eat together at a place and apparently the place has no halal certification, or maybe serve halal food but also serve wine. The colleagues & non-Muslims are very respectful, so they actually don't mind if you don't want to join or prefer a different restaurants, but you need to be alert, vocal and not feel shy about it by your own means.