I ride with the same clothes and shoes I wear at any other time. Plastic hats aren't required here, but I'll sometimes wear my 1995 Ozzy concert tour hat when the sun is at a low angle.
On a given ride at the Riverfront I might see a hundred or more other riders, but they'll all be wearing dorky padded shorts, a jersey with advertising, and a plastic hat. About half of them will be wearing gloves, even with the temperature near 100F.
"Who let that weird guy on the bike trails, and why isn't he wearing the proper uniform?!"