People were playing some kind of game on the terrace, crawling on hands and knees blindfolded, carrying plastic glasses of water between their shoulder blades. The game was called "Llama". You raced a competitor blindfolded, to the end of the terrace, always moving hands and knees alternately as four-footed animals did, and without spilling the water, although much water was spilled.
Ugh, suburban hell in the disguise of a party game. I don´t know how these people can stand it. I guess, the booze must help a lot.