In Luanda be careful (it is quite a dangerous city) but enjoy yourselves too (it is also a city full of nightlife)! I remember some nice discos such as the Palos (very exclusive) and the Don Quixote (more popular). At night look at the skyline of the city: your eyes will tell your brain you are in New York, though your nose will make clear that this is not the case! :)Don't miss the beach of Mussulo, take a bath on the ocean side (the other side is less nice), then head South to Cabo Ledo and eat some of the best and cheapest lobsters in the world.