What is ECOWAS, you ask? It is the Economic Community of West African States. I thought about just covering the UEMOA countries (West African Economic and Monetary Union) but that is just francophone countries and I love Ghana so I decided on ECOWAS.
The countries in ECOWAS are Benin (where I served in the Peace Corps), Burkina Faso (where I attended FESPACO!), Cape Verde, Cote d'Ivoire (where I biked my first century), Gambia, Ghana (home of Milly's Backyard!), Guinea, Guinea Bissau, Liberia, Mali (home of Sekou Oumarou!), Niger (challenging for vegetarians!), Nigeria, Senegal, Sierra Leone, and Togo (the only place I ever attended a beauty pageant).
Here they are in a map, courtesy of Wikipedia: