A Unique Christmas Party! (Image story in the description)

They had no idea what to expect at the Unique Christmas Party tonight. It was at a large mansion on the hill that was now used as an event center and hotel. The party was in the small ballroom and surprisingly around the indoor pool. The pool area was decorated, and was actually open with a sign that said, "enjoy a swim in the pool." A few party attendees were already using the pool, and they were definitely intrigued by the pool room. It didn't take long for them to begin flirting with going in the pool since it was available for use. They giggled at the thought and at first just waded in the shallow end, even posing for a picture wading knee deep in their jeans. But it wasn't long before they had ventured much further into the pool eventually soaking their sweaters and puffy coats. They played and splashed until they decided they better get out in hopes of being able to dry some before venturing home.

Thanks to @MoniB for the open prompt and inspiration to tweak it.