CREATE TABLE table_37269 ("Year" FLOAT, "Men's singles" TEXT, "Women's singles" TEXT, "Men's doubles" TEXT, "Women's doubles" TEXT, "Mixed doubles" TEXT)

what game had a doubles round in 1979
SELECT "Mixed doubles" FROM table_37269 WHERE "Year" = '1979'
SELECT "Mixed doubles" FROM "table_37269" WHERE "Year" = '1979'