Local supporters and campaign volunteers are turning up the grassroots effort with a couple of pre-caucus events.Tonight: Watch the final scheduled presidential debate at the Showbox SoDo. Doors open at 4 p.m., debate starts at 5 p.m., followed by a round table discussion with volunteers just back from campaigning for Obama in the early states. Debate will be replayed at 8 p.m. Drink and food specials promised.Bowl-O-Bama Feb. 7: Test your skills against those who support hope while visiting one of the region’s few remaining alleys, 6 p.m. at White Center’s Magic Lanes. A $5 cover gets you 50-cent games, 50-cent shoes and dollar beers. Also, Sen. John Kerry will be in town stumping for Obama tomorrow at the Husky Union Building at 9 a.m. RSVP encouraged, call 206-529-3859.