Agree with above, I never once felt pressured to do anything on a layover. Then again, I was always down to go out and about with the crew. I'm generally extroverted/social person and I found going out with the crew is what made international layovers so much fun. Sometimes I'd roll on my own, never heard a word other than what did you get into on the layover.

I never avoided a Captain because i was never going to let someone dictate what trips I flew. So I'd never let something ridiculous like perceived peer pressure, keep me from bidding a seat.