Haha, I'll be happy to meetup with you! I'm not middle aged, hope that's ok haha :) so historical:
Start with Gaudi - palau guell, casa batlló, casa Mila (in that order); hospital de sant pau and santa creu - beautiful architecture and less popular I.e. not too crowded; The history museum at Port… More
Go to the champagne bar. The funnest place to eat on earth. Can Paixano! https://maps.google.com/maps?oe=UTF-8&hl=en-us&client=safari&um=1&ie=UTF-8&fb=1&gl=us&entry=s&sa=X&ftid=0x12a4a2ffe9fe5b23:0xc8516ba7d49ce64d&gmm=CgIgAQ%3D%3D