i used to drive down to barcelona fairly often whilst living in toulouse,
depends who you are going with, there are a fair few hotels on la ramblers to suit most budgets and its quite central to the night life.
the olympic port is the best place to go out, lots of bars next to eachother, again to suit most budgets and tastes.
the zoo is pretty awful if you are bothered animal rights (as are the bird cages on the ramblers) although the aquarim / sea life centre is pretty good. and of course the catherdral is worth a visit, but if you suffer from vertigo or claustrphobia do not climb the towers ( i suffer from both :cry: ).