I did attend one book study at the Kingdom Hall recently, just to have something to do on a family visit and to avoid making waves and ruining the visit for everyone. I made sure I packed my copy of the publication being studied, along with my old copy of the NWT and I packed my nicest meeting dress, but didn't wear the pantihose - extremely unusual for me - but didn't want to be bothered. It was a very long dress anyway.
It was kind of boring, but fun too, to sit there with a COMPLETELY different viewpoint. The brother conducting was such a robotic shell of a human - used all the terminology we've been taught - it was sickening. And to think we used to regard those men as "so spiritual." I just looked up all the scriptures cited but ignored in the study, and that took up all the hour. Tried not to listen to all the canned drivel known as "comments."
Talked to a lot of the people after, mainly because my family were making such a point of introducing me to them. Except for the elders with the ever-present ulterior motives in talking to visitors, the people were nice.
My only slip up was referring to one of the brothers' wives as "the brunette lady in the front row." Oops! I corrected myself and then referred to her as "sister" but it was too late! The elder immediately wanted to know what congregation I was from!