Fast. Easy. Free. Pocket Conspiracies are smartphone games for small groups. Jubilee is the first of the Pocket Conspiracies, and is a game for 3-10 players, all of whom must be in the same room (since much of the game is conducted via face-to-face interaction).
The story of Jubilee is that a group of knights have come together to compete for the heart of a lady/gentleman/gentleperson. There are three challenges the knights must perform, which we won't spoil, but each involves face-to-face interaction and the capabilities of your smartphone. Each player will need a smartphone with the app, which is free. Get it on Google Play or Download it in the iOS App Store.
Expect a game to take 20-45 min. Rated for ages 10+.