Does anyone know why a small group (7-8) of wasps would be hanging out on the outside of a window?

I live in Missouri, we’ve had an extremely hot summer and about a month ago I noticed a small group of wasps hanging out on the outside of the bathroom window. I know I could just spray them, kill them and no more wasps. Their behavior is pretty interesting though-they’re literally just hanging out. No nest building, no mating, eating, they just stand there. Occasionally I’ll see one move around a little but then it just goes back to the group and becomes docile again. They aren’t bothering me or anything else but they are there day and night. I’ve NEVER seen this kind of behavior on an insect and was wondering if anyone else has or may have an idea what I’m witnessing.