How do I find a list of cybercafes (does anyone use this word anymore?) – or any other retail outlet or service, for that matter?
The Paginas Amarillas (Yellow Pages) website is probably your best bet. Enter “Barcelona” as your province and city and “cibercafes” (note Spanish spelling) on the “¿qué estás buscando?” line.
An alternative Yellow Pages is QDQ.
To locate the address you find, you can always use good and old Google Maps… or check out more Barcelona maps.