1. Image > Mode > RGB Color
2. Duplicate the layer
3. Eyedropper. Choose darkest blue. It is Foreground color for use in Step 9
4. Quick Selection Tool. Select the men.
5. Use it to create mask (Layer mask symbol at the bottom of the Layers panel)
6. Invert the mask (Image > Adjustments > Invert
7. Choose the image in the duplicate layer
8. Use Curves to darken the highlight end of the curve
(This is a matter of personal taste. You may choose to darken it more than I did. It will be tweaked again in Step 10)
9. Edit > Fill with Foreground color set to Color (See Step 3)
10. Use Curves to adjust tone level of the curtain
11. Choose the Mask and use soft edge Brush to reveal the logos on the curtain
I suggest that you also clone away the sharp shadow alongside each head.)
THANK YOU! Your steps got me to the perfect solution and I made a few additional adjustments of my own along the way. I still haven't completed any of the OTHER edits yet, but, as you can see below, the image is already MUCH better that what I started with!!
I tried to mark your answer as "correct" but my computer kept telling me there was an error. So, if it does not show as the correct answer when I post this reply, I am sorry for that. I always know that the folks at the Adobe Forums will come through for me!!
Nice job! Ya done good.
Try that "Correct" option at another time. It just may work. The important thing is that you were able to get the result you wanted.