To illustrate: if we saw the same woman in our yoga class consistently enough that we regularly made small talk in the locker room after class we would be Contact Friends. Showing up at class is more fun because we see someone familiar there with whom we can whine about how hard certain poses are to master and share where we bought our flattering yoga pants. For that person to develop into a Common Friend our connection would advance from engaging in locker room chitchat to the two of us drinking smoothies or tea for an hour after class on occasion.
