This was a first. Diana rarely got to dance at events because people tended to think it would insult her, or they were afraid of her...or they were being improper with her and she told them no so she wouldn't have to punch them on the dance floor. Bruce wasn't afraid of her, he obviously wasn't worried he was insulting her and despite his reputation she knew he wasn't going to be punched on the dance floor.
"Thank you. I do like to dance." She took his hand with a smile. Flat footed she was as tall as Bruce which was one of the reasons she was wearing flat shoes with her dress tonight.