CREATE TABLE table_203_346 (id DECIMAL, "date" TEXT, "location" TEXT, "venue" TEXT, "opening act" TEXT, "supporting" TEXT)

who was the opening act at the viper room ?
SELECT "opening act" FROM table_203_346 WHERE "venue" = 'viper room'
SELECT "opening act" FROM "table_203_346" WHERE "venue" = 'viper room'