Thanks for reviving this, Claudia. Since we arrive in Lisbon at 5 p.m., I thought we might go prowl around after dinner a bit (if our sleep cycle is still on North American time), maybe find a club with some music.
Since we're leaving at 2 p.m. the next day, I would do a ship's tour, if anything--Sintra is first on my list--to ensure we don't miss the boat!