The place to be in Luanda is the Coyote Bar- small but imtimate, with more sexy girls than guys by a three to one ratio. You cannot go wrong here. Buy drinks with a $10 coupon, which will get you 3 beers or so. The place is not that fancy, but the music is great, and the girls can really dance!! The Coyote does not get going until after 23:00h, though.
Before that time, try the Royal Bar, 100 meters from Palos. Pool table, small and intimate, and an international crowd of girls just dying to meet you. I met girls from Ivory Coast, DRC, Congo Brazzaville and Namibia here, not to mention Angola. Good place to meet someone informally; They usually go to Coyote later.
Avoid Palos at all costs!! It is an expensive racist joint run by the metise (mixed race) Angolans- they blatanly discriminate against black girls at the door!! They ought to be closed down!!
Also, try not to walk at night- there are many thugs along the road- take a taxi. The MaconTaxis are the only show in town, you should get the number of a driver to call when you need a lift.
Hotels are picky when it comes to accepting visitors. Tropico, for example, requires the girls to have real ID cards and requires you to pay $20 just to let them come up to your room! So beware!