Some airports use the sunflower lanyard as a signal. I’ve also seen buttons that folks could choose for their desired level of interaction. Eg: a red button means I want to peruse your booth, but please don’t make small talk with me.

Places to SIT- for folks with POTS, chronic pain & fatigue, energy-limiting conditions, etc.
I don’t *want* to lie down on the floor, but if my heart rate skyrockets, that’s what I’ll do. Bonus if I stick my feet in the air… I mean “elevate my legs above heart level.” 😉