CREATE TABLE table_204_269 (id DECIMAL, "week" DECIMAL, "room" TEXT, "winning couple" TEXT, "2nd couple" TEXT, "3rd couple" TEXT, "chumps" TEXT)

who became the winning couple the most ?
SELECT "winning couple" FROM table_204_269 GROUP BY "winning couple" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "winning couple" FROM "table_204_269" GROUP BY "winning couple" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1