Paty's Mar y Mar Closed Thursdays?

We were surprised to arrive at Paty's May y Mar on La Ropa this morning, only to find a sign: "Cerrado los jueves". In 20+ years, for us, that's a first. Closing for a day a week in mid-January? At the height of the season? Sign of the times?
Several other signs there advertised "zumba" on Tuesdays and Thursdays. Confusing.