One of my favorite things is to go out to lunch. I need to get out of the office mid-day or I go stir-crazy. It's also a great casual way to keep up with colleagues or social acquaintances. There are a few nice places within walking distance: Aladdin (middle-eastern food), Amsterdam Cafe (Italian), Bole Mini (quick sandwiches), and Lime Tree (ferenge food). Visitors from the US always remark about how reasonable these places are. You can get a really nice lunch for 50 birr, all included.
I was telling M, one of the drivers how much I like Aladdin and he asked about the cost. I replied "oh, it's cheap, you can get everything for 50 birr." He laughed out loud. (Ethiopians do this a lot at things I say. But only when I'm not trying to be funny. Hm.) He said it was expensive and I asked him to explain. He said "look, you work for an international NGO; they pay at the top of the scale. For the average person in Addis spending one birr for them is like spending one dollar for you."
And I thought about spending $50 on lunch.