Very cool piece. A few questions, if I may...
Where exactly are Gehrig and the others?
Why are most of the people wearing long aprons in this photo? Are they expecting a plate of ribs?
Did you post this because you wanted to know the true value, or you wanted to hopefully ID some other patrons in the photo, or you simply wanted to share the image (or all of the above

)?
I believe I've seen a photo of this same dinner, but it was from a different angle. Someone may have posted it here previously. I know it also had Lou Gehrig in the photo.