Badly written sentence of the week

"Wearing tie-on bibs and chanting "Crab! Crab!" these popular events attract hundreds, each of whom can consume up to two pounds of un-cracked crab per person and are often an organization's biggest fundraiser."

http://www.contracostatimes.com/news/ci_19988336/ever-popular-crab-feeds-offer-food-fun-and?source=rss

I want to know how you get a bib on a chanting event.