Yup. The rules are easy too. You stay surface. I get anxiety in
  large crowd social situations, like due to deafness (birth
  defect - it's a struggle to interpret ONE person's words - and I
  hide it well in small groups). I get very anxious and make an
  excuse and leave. Too much input at once. But I can navigate for
  short periods of time. Smile, say the expected things. It's not
  rocket science. I prefer finding one quiet person I can just sit
  with who doesn't like talking much, or if he/she does, it's deep
  talk that helps me block out the rest of a noisy environment.