No one is ever going to be offended by having a stranger say hello to them. In fact, they will be grateful! Because nine times out of 10 everyone else in the room is feeling as awkward and uncomfortable as you are. Everyone wants to feel accepted and acknowledged, just like you do – so why not be the one to walk up to others and simply say hello. That is all it takes. Walk up to strangers in the room, make eye contact, smile, and just say hello.

Source: Forbes