@derekgs I reckon you could easily have a fortnight of complete food and wine indulgence in excellent restaurants without any hard work at all - it’s a city full of delicious places to eat and drink.
The meal we enjoyed the most was at Cantina 32, Rua das Flores, 32, Porto. A superb Octopus starter was very memorable, BUT as with lots of good places, I would book ahead if you want to be sure of a table. It has an odd, slightly industrial decor theme inside, but the food & service were great.
There are also lots of amazingly well stocked wine shops - one we frequented was Garrafeira Nacional Conceição on rua de conceição - excellent and amazing selection of almost entirely Portuguese wines.
There is an open air bar at the top of the Porto Cruz’s 360º Terrace Lounge in Gaia that has superb views across the river to the old town, serving cocktails and chilled white port. Music may be a tad loud and not to everyone’s taste though… You can’t miss the location - the cable car dips by just a dozen feet above.
If you want to go to Graham’s or another of the larger port producer’s cellars for a tour, book ahead. We had a great time at the much smaller, but very helpful Churchills, where we dropped in on the last tour of the day. We were enthusiastically and knowledgeably guided through their tawny wines including a small glass of their 30 year old, which wasn’t on the menu, but which was brought out as we had shown such interest. A fantastic end to the day.
Finally, a trip on the rickety tram to Foz is well worth it - it was blowing an absolute gale when we went but also incredibly warm and sunny. The beaches are mostly rocky, but the walk along the edge of the Atlantic ocean was a refreshing change from the city.