In 1937, how many teams whose players got at least 500 points?
in 1937 refers to year = 1937; player got at least 500 points refers to Sum(points) > = 500
SELECT COUNT(*) FROM ( SELECT T2.name, SUM(T1.points) FROM players_teams AS T1 INNER JOIN teams AS T2 ON T1.tmID = T2.tmID AND T1.year = T2.year WHERE T1.year = 1937 GROUP BY T2.name HAVING SUM(points) >= 500 ) AS T3