Gifted wort - what do I do?

I was given a 20L cube of West Coast Lager wort, but I'm not set up for lager. We're in Autumn now and the temperature is going to be mid 20s (high 70s F) for weeks. I don't have a brewing fridge that can sit at 10C for weeks. So what do I do?

Some ideas are to use Kveik and make a pseudo lager, use pressure... somehow, or find a mythical lager yeast that can handle room temperature. I read that some lager yeast perform ok at room temp, but I don't know what they are. And I don't know about lagering.

Any help, even questions to answer would be much appreciated.