Rent of location city center for party (Barcelona)

I would like to rent a venue in Barcelona end of June / early July to throw a party.
The facility should probably be able to accommodate a couple of hundred people (standing) but I have no definite number of attendees.
Any suggestions as where to start my search ?
(beyond the obvious option of google.)

The catch: This time around I will try the Wolfram Alpha way and go by human intelligence as opposed to a computer algorithm.
At least initially )

Any idees ? Any suggestions ?

Gracias y saludos!
M