Quick Definition: A group that contains both girls and guys.
The term “mixed set” comes from Mystery, who was a stage magician and referred to each group of people he came across while sarging as a set. While a set can refer to any group of people (or even an individual), a mixed set specifically refers to a group of both guys and girls.
Mixed sets are specifically identified by PUAs because the opener and general approach used on a mixed set can differ from one used on a group of just girls. Typically, when handling a mixed set, it is important to first befriend the guys, so that they don’t feel threatened. It’s also important to establish the relationships within the group (are any of guys boyfriends? husbands?) and to provide value to the entire group.
Many beginning PUAs avoid approaching mixed sets because they are intimidated by guys, afraid of getting AMOGed, or afraid that the guys in the group might be boyfriends. However, experienced PUAs know that mixed groups are often just friends, and it pays to be social with everyone in a venue regardless of whether they’re guys or girls.