Keep in mind that night-clubbing doesn't real start before 2 or 3 in the morning, in summer even later. Instead people meet friends and have a drink in some of the bars before they continue the night in the clubs.
Rua Cecilio de Sousa 84
Rua da Palmeira 38Video

Rua da Atalaia 128
[Metro: Baixa-Chiado]
Av. Infante D. Henrique, armazém (warehouse) A; Cais da Pedra a Sta. Apolónia
Rua da Imprensa Nacional 104-B
[Metro: Rato]