Raytoei: Must be from your hotel room.
There is a reasonably good (for Cuba) pizza place in view there, right at the corner of Prado y Neputno.
Also, all those old American cars queued up there on Neptuno are communal taxis. 10 pesos Cubano (about 40 cents US) will get you a ride pass the University of Habana to 23rd. It is worth it for the experience if you have moneta nacional. If you try to pay with pesos convertible, they will tell you the fare is 3 CUC. (about $3 US)
enjoy!