Realizing the CAPSI 2010 conference had no schedule for Friday afternoon, I decided to go for a walk around town. Viana do Castelo is a small but very nice town. Beautiful streets with old manor houses, nice monuments and historical building, and a modern, stylish commerce (see Boca do Lobo, for instance). Very worthwhile.
Lunching or dinning? Try Casa de Pasto Maria de Perre. Shopping? Walk east to west, along the Rua da Bandeira, through Praça da República, then along Rua Manuel Espregueira.