Yes, I used to work with good companies that serve small private tours in BCN. They offer exclusive tours and I can work with them for a tailor made tours 4-5 hours for both of you depending of what kind of experience you want in the city.
You can choose from:
Half-day tours that may include mixed means of transport: Land, Sea and Air.
Riding a bike or be driven in a Mercedes van through our landmarks (Sagrada Familia. Gaudi's builings, Las Ramblas, etc.)
Sail with an eco-boat to enjoy the mediterranean and the skyline of the city
Admire the city from the air, taking the cable car or helicopter, etc.
Or a half-day gourmet tapas experience 4-5 hours walking tour
Or discover the city by yourselves renting a Smart electric car (mini iPad with Navigator, an app with GPS, tourist information, 3G internet connection is included).
Or half-day tours around Barcelona to Monsterrat Monastery, or to Torres cellars an vineyards, shopping, etc.
Drop me an email to: firstname.lastname@example.org and let me know your preferred date to schedule the tour, your experience preferences (In or around Barcelona), if you would like to try biking, driving or walking tours, tapas, Gaudí, FC Barcelona soccer club, etc). If you have any special interest in Barcelona there's no problem to costumize a tour. No limits. Once a couple of clients asked me a walking tour in the old city with homeless tour guides I was surprised that they knew about these tours in the city and I must admit that I've never booked these tours before. All of us were really impressed and happy to help them. So I don't mind to help with exclusive premium tours or "with purpose" tours.
BTW, when check-in at Hotel Cram let me know so I'd love to invite you to a welcome drink over there You'd love staying at the Cram and the Eixample Esquerra neighborhood (We, locals call it the GayEixample district) it is very safe and packed of cozy restaurants and bars and walking distance from the noisy Plaza Catalonia or the crowded Ramblas area.