My wife's mom, Jeanine Haberman (Meyer) found this photo when looking through her fathers (Harry Meyer) things, Harry is Indy 500 winner Lou Meyer's brother. This is a photo of four Indy 500 drivers an two unknown people.

left to right
unknown
Floyd Davis (1941 winner) #16
Lou Meyer (1928, 1933, 1936 winner)
Lou Moore (2nd 1933, 3rd 1934)
Fred Frame (1932 winner) #34
unknown