My parents went to see it yesterday (it was their 28th anniversary). Mom said the crowd was about average for a Wednesday afternoon, all black, and that they were talking and yelling at the screen like they were at home. Mom said my dad was HEATED during that Troy/Rose showdown. She said that he couldn't stand Troy to begin with (which really surprised me - I thought he'd be sympathetic), and when the big showdown finally happened, he was like "AW, HELL NAW!" and my mom had to jerk him back in his seat.
My dad told my mom that he always thought his mother was a doormat to his father, and it took this film for him to realize how misguided his feelings were. Since Dad couldn't do jack to his father (not that he came around much anyway, even though they were married - he supported them financially, but was out in the street 24/7), he channeled those ill feelings to his mother, not realizing that she had absolutely no other options but to stay with him, especially for the sake of her children. We hear a lot of "I'd shovel shyt in the street before blah blah blah," but it's easy to say that in the 21st century with so many resources available to us. Rose was actually lucky that at best, her husband was a cold man. Think about how many years it took before marital rape became a crime, or worse. (Of course, all my dad told me was that he loved it and thanked me for raising such a fuss about dragging him to see it.)
Mom said the men in the audience (my dad included) kind of stood/sat around and talked for a bit while the women (herself included) were in the restroom. I'm telling you, what "For Colored Girls" is to black women, I really thing "Fences" is going to be to black men. Representation is so important. We need more and more of this.