Visit msnbc.com for Breaking News, World News, and News about the Economy

On Saturday January 10, San Franciscans will be asked to drop their pants for the 8th Annual No Pants! Subway Ride. The flash mob-esque event will happen in a concentrated area, with the meeting point and starting time to be posted in early January. But in the meantime, feel free to RSVP fro the mildly nude subway ride on Facebook, right here.

Other participating cities? Adelaide, Australia; Amsterdam, The Netherlands; Boston; Chicago; Denver; Lisbon, Portugal; Los Angeles; New York; Phoenix; Portland; Toronto, Canada; Twin Cities; Vienna, Austria; and Washington DC for starters. Also, check out PG-rated coverage of last year's No Pants Ride from the Today.

Today Show Coverage from last year's No Pants Ride