In the mid 60's,when I was just a pup,my Dad took me with him on a business trip to Chicago.He got me a ticket to a Cubs-Giants game while he was working.
April....cold...drizzling...dreary.No more than a couple of thousand in the stands.
Many people don’t realize that despite being known as “America’s pasttime” (at least for propaganda purposes), Major League Baseball teams often did not have such big attendance figures until recent decades. For instance, the Philadelphia Phillies, in one of the 5 largest cities in the country, never averaged 10,000 tickets per game until the late 1940s and never averaged 20,000 tickets per game until Veterans Stadium opened in the 1970s. So even though we may think of stadiums packed with people for the World Series, etc., that has often been far from the case during the regular season, especially on weekdays and for teams in smaller markets and/or teams not at the top of the standings.
http://www.baseball-almanac.com/teams/philattn.shtml