As of yesterday, the Walrus and the Carpenter, Renee Erickson’s pretty little oyster bar in the Kolstrand Building on Ballard Ave, has a happy hour. And while it does have one twist, the plot of this HH isn’t nearly as difficult to follow as that at Chef Erickson’s other white-on-white eatery, Boat Street Cafe.

For one thing, you don’t need a reservation. If fact, Walrus doesn’t even take reservations. HH is from 4 to 6pm Monday through Thursday.

But here’s the thing, the earlier you get there, the cheaper the oyster. Like at Elliott’s. It’s called a progressive happy hour, because it gets progressively more expensive. At Walrus between 4 and 5pm, oysters—Kumamotos, kusshis, etc.—are half off (so, $1 or $1.50, depending on which types you choose.) Then from 5 to 6pm, they’re only a quarter off (so, $1.50 or $2).

Drink discounts are not progressive. From 4 to 6pm, the restaurant takes $1 off glasses of muscadet, the classic oyster pairing wine, $1 off draught beers, and $2 off craft cocktails.