Official Hotel European Congress of Perl 2015 (12 minutes' walk according to this Google map).
These are the options for the YAPC::Europe attendants:
This special price includes:
Note, two people on #yapceu on IRC report that no more special price rooms are available, but to book a room at Abba Granada Hotel with this Special Price you will need to send an email to: granada@abbahoteles.com, with the following reference: European Congress of Perl 2015
More info about Abba Granada Hotel (including its exact location) at www.abbagranadahotel.com