Unfortunately, Jenners itself does play piped music, quite loudly at times. If you can negotiate that, peace and quiet await you in their café areas. Both are self-service, one on the second floor and one on the fifth floor (Café Zest). Both serve coffee, snacks and light lunches. There is a different menu in each café. The view from the second floor café, looking out over Princes Street Gardens and the skyline of the Old Town, is particularly recommended.
Edinburgh EH2 2YJ