CREATE TABLE table_21641 ("Game" FLOAT, "Date" TEXT, "Opponent" TEXT, "Score" TEXT, "Location" TEXT, "Attendance" FLOAT, "Record" TEXT, "Points" FLOAT)

How many attended on mathches against atlanta thrashers
SELECT COUNT("Attendance") FROM table_21641 WHERE "Opponent" = 'Atlanta Thrashers'
SELECT COUNT("Attendance") FROM "table_21641" WHERE "Opponent" = 'Atlanta Thrashers'