Louisiana leads the nation in oyster production, but how does all this bounty stack up against pricier oysters from the Pacific Northwest? Slow Food New Orleans hosts a comparative tasting this Tuesday, Oct. 20, at the Uptowner (438 Henry Clay Ave.) to find out. "Oyster Bill" Whitbeck, co-author of The Joy of Oysters and manager of Puget Sound's Taylor Shellfish in Washington state, will present his region's bivalves, and Sal Sunseri from the French Quarter-based P & J Oyster Co. will handle the local variety. Doors at 6 p.m., $20 per person. To register, email firstname.lastname@example.org.