Love Letter. A very quick game with just 13 cards. Games take about 3 minutes so you can play multiple rounds if you want. Suits 2-6 players (best at max 4 in my experience). Generally very popular and easy to learn.
Comes in dozens of themes as well, if you don't like the "princess in a castle" theme. You can find Batman, Cuthulu, The Hobbit, versions depending on your preference.
Defederation blocks communication both ways, I believe.