If it may be hard to get into an opera gala on short notice, seats sometimes become available at the last minute because reservations are canceled.
Gale-force winds on Thursday jeopardized the tent for the opera gala, delaying the start of dinner.
Seven "Opera Galas," programs of arias, sold 1,500 tickets.
The labor dispute has already forced cancellation of some festivals and the disruption of the opera gala in Aix-en-Provence.
Cura emerged from a brief holiday for three opera galas and a reprise of his Pagliacci in Berlin.
The Queen Sofía company promotes symphonic concerts, opera galas, and vocal recitals.
Opera Gala presents "Great Arias-Glorius Voices," including young artists performing in more than 24 arias.
"Il Viaggio a Reims" stands somewhere between an opera gala and a comic "Grand Hotel."
And Dame Gwyneth Jones will sing at an international opera gala with the Atlanta Opera on July 27.
An opera gala featuring the soprano Angela Gheorghiou and the tenor Roberto Alagna is Sept. 6.