When you are at someone else’s house, sometimes UNO is your best option. Unless you always bring games with you for just such an emergency. I personally keep a couple games in my car and my wife keeps a set of RPG dice in her purse.
We haven’t touched the “Classic” board games in a long time. They are here, but with so many better options, I do not expect to see them played for a long time. If you are uninitiated to the world of hobby gaming, I recommend you dig a little deeper. The board game world has increased immensely. There are tons of great games that still have not hit the mainstream.