Schmooze

To schmooze to converse informally or chat and it also means to chat in a friendly and persuasive manner especially so as to gain favor, business, or connections.
This image is from a professional event in Portland, Oregon, so it relates to the second meaning. You could say that this kind of schmoozing is networking.
But you can also just schmooze, especially at a party or in a cafe or bar. Just chat with people and share a few jokes together!
This post is dedicated to Montse, who reminded me of this wonderful word!