Birthday dinners need a different register than anniversary or first date — louder, brighter, more theatrical. Barcelona does this well in three modes: the show-stoppers, the group-friendly rooms, and the festive-energy tables where the celebration is in the air. Barcelona invented avant-garde cooking and never quite stopped — the post-elBulli generation is bigger here than anywhere else.

What we screen out: rooms too quiet to feel celebratory, rooms too small to fit a party, rooms where the staff resent groups. What we screen in: tables that handle 6 to 12, sharing menus, rooms with enough volume that the singing won't feel awkward.

The 15 rooms below are organised by mood. 3 weeks at top, walk-ins doable for the top tier; flexible for the rest.