Being ancient like I am, I fondly remember double-headers a-plenty back in the 60's and 70's. Seemingly Sundays almost always were double-headers and then there were the twi-night double-headers. Man, I went to many a double-header, including the bat-day twin-bill in '73 that drew a still record 55,555. I was also at a Monday double-header in 1970 that drew, are you ready for this(?), 672. If I recall correctly the Sox had three double-headers that week. Probably a record.