CREATE TABLE table_79628 ("Date" TEXT, "Opponent" TEXT, "Score" TEXT, "Loss" TEXT, "Attendance" FLOAT, "Record" TEXT, "Arena" TEXT, "Points" FLOAT)

What is the Attendance at Joe Louis Arena?
SELECT AVG("Attendance") FROM table_79628 WHERE "Arena" = 'joe louis arena'
SELECT AVG("Attendance") FROM "table_79628" WHERE "Arena" = 'joe louis arena'