As tempting as it seems to wear tennis shoes with your tux, don't do it. I think it looks ridiculous. If you're 14 years old, maybe give it a shot. In general, don't portray anything that says 'I'm too cool and I don't care.'
Then, with lots of people doing that without ever looking over their shoulders to see how they were affecting anybody else, it couldn't work, and it didn't work, and it just came to a standstill.
I see Christ as the incarnation of the piper who is calling us. He dances that shape and pattern which is at the heart of our reality.