Time Out says
The rooftop of the Porto Coliseum Hotel is open to the public, and is a great spot to grab a drink at the end of the day with a view over Baixa. The good news is that it is not dependent on the weather: it is open year-round, with a glass protection and heaters for when the days get cold. On Fridays and Saturdays there are DJs, on Sundays there’s live music, and the venue also organises wine and gin tastings.
Rua de Passos Manuel, 135
|Opening hours:||Mon 17.00-23.00, Wed-Sat 17.00-23.00, Sun 17.00-22.00.|