It is tough. I feel you.
Your hands suddenly, are very large; where do they go, or what do they do?
But turn the music off.
Take a breath. No one is talking about you, nor do you even exist; except as another human body cohabiting, briefly, space with others.
Your identity consists of your instantiation in space; you can relax, allow your body-vessel to idle, and crunch through non-present problems. Or just relish the ambient hum. Maybe someone else who is unplugged has made fleeting eye contact, and asked you about the weather.