SAN FRANCISCO >> They are getting ready to grin and bare it at San Francisco’s weekend nude-in kicking off the Folsom Street Fair

The San Francisco Chronicle says 50 naked people showed up for the "nude is not lewd" rally at the Castro and 17th streets plaza nakedness at what is known as the Buff Stop.

It’s not a crime to walk around naked in San Francisco.

More are expected Saturday because of what is seen as an assault on nudist rights to shed clothing.

Supervisor Scott Wiener has proposed legislation mandating that nudists put a towel down on a public chair or bench before sitting on it.

But the pre-Folsom Street Fair nude-in was planned before Wiener’s proposal.

The 13-block fair celebrates all things nude and leather-related.