Dear Amy: I have a question about dancing etiquette. I am a middle-aged woman. My daughter and I recently attended a concert of the B-52s at a theater venue. Most of the audience members were my age. People were seated and quite stationary during the concert. I wanted to dance but didn’t want to bother anyone. Finally, a couple of people near the front started dancing, but the people in back of them complained that the dancers were blocking their view. Is there a right answer when it comes to dancing at a concert in a theater? — Wanna Dance Dear Wanna Dance: What kind of superhuman can stay seated during “Love Shack”?