The side hug is a new one to me. I'm more familiar with the lean-in one-armed shoulder hug. You know, when you stand a good foot and a half apart, both people awkwardly lean in and gingerly wrap a single arm around the other's back - alternate arms, of course. A mini-embrace, followed by a single pat on the back - or double if you're really affectionate, and then quickly straighten back up from the waist and take a step back so as not to crowd personal space...