It’s called a “bikini bike wash,” which means showing skin and raising money for charity and — in a surprising number of cases — also provides a decent cleaning of a motorcycle.
Some motorcycle dealers use “professional bikini bike wash teams” and others — like this case at Thunder Road Harley-Davidson in Danville a couple of year ago — featured the young women who worked in the clothes shop at the dealer.
In either case, most folks have a good time and we get a chance to admire the ladies who wash the bikes.