Maybe if you are near the native speaking country, or potentially if there are significant numbers of immigrants.
But knowing Spanish adds nothing social within New Zealand.
I had a Spanish girlfriend when 30, which made learning Spanish rather incentivised, and I embedded overseas for many months to learn conversational Spanish.
However I rarely hang out with South American immigrants in New Zealand, and those I have met (say at the pub) often prefer to stick with English.
Knowing Spanish is fantastic when travelling - the months spent learning have led to way more enjoyment when subsequently travelling to South America or visiting friends in Spain. Spanish also helps a little in France, Italy, Portugal and Brazil.
I intend to spend a few months in South Korea so maybe I'll try and learn Korean (without a girlfriend). However I'm now older so I suspect it will be much much harder.