Re: dargah ajmeer shareef(khwaja gareeb nawaz)
Is that like a first? Will miracles never cease 
And actually I agree with you all as well. I believe if you visit a mazaar, you can recite fateha for the deceased, but in terms of asking/praying for a mannat or dua, only Allah (swt) grants our duas.
All the while I was there, I kept saying in my mind, Allah (swt) you know my neeyat and you know what’s in my heart. We went because it was part of the tour of Agra-Delhi-Rajasthan.