The clinking of glasses and the low murmur of conversation fill the air at Café Riche. Sunlight streams through the windows, casting a warm glow on wooden tables that have hosted generations of writers, artists, and revolutionaries.  This is where Naguib Mahfouz once sat, where political activists gathered and Egypt’s history lingers quietly in the worn-out chairs and framed photographs lining the walls. A few streets away, Souq Diana comes to life every Saturday. Vendors…