Bottomless anything is good, especially if it involves champagne. Just order brunch at the Coterie Room or Ma'ono (both pretty damn great) and your mimosa ($10 at the former, $12 at the latter) will have no bottom.
Civilized but not-too-schmancy wine shop Portalis offers free tastings on Saturday and Sunday. A lot of regulars show up, particularly Ballard-farmers-market shoppers on Sundays. Those people sound smart. Free.
Every last Sunday of the month, Little Water Cantina roasts a couple whole hog's worth of local-beer-brined pork tacos: You get a plate of those, a matching beer, and live music, too. Weather permitting, the party's on the patio with its awesome Lake Union view. $17.
Cure would like to invite you to “celebrate or lament” the end of your weekend with a $12 bottle of Cava (Spanish sparkling wine) on Sundays. Starred for cheap bubbles on the Lord’s day. $12.
Jesus god, this sounds good: Dinner for two in the form of a whole two-pound Dungeness crab—wok-seared with tamarind sauce, Singaporean yellow curry, scallions and ginger, or Saigon salt-and-pepper style—served with a fresh mango and papaya salad for $30, every Sunday and Monday night at Monsoon. Also: Bottles of wine, 30 percent off. See you there. $30.
Wallingford's Moon Temple is one of the highest-quality dive bars this city is privileged to still contain. Trivia night here is fueled by strong-ass drinks, and probably concomitantly fun. Long live the Moon Temple! $2 (registration fee per player).
Geeks Who Drink is a company that hosts trivia quizzes at different bars every damn day of the week, here in Seattle and all over creation, usually free (except for bar owners, who pay a "reasonable" rate). Starred for geeks who drink who like pub trivia.
Literally millions of happy hours are taking place around Seattle RIGHT NOW. One is highly likely right under your all-too-sober nose: Find out where it is here (for iPhone users) or here (for Luddites). Food! Drinks! Cheapness! Yes! CHEAP!.