Blaise and OPEN (around 6:30 pm)
Blaise had been taken off guard by the invitation. He'd only barely spoken to Lucy. Other than Millicent and their small conversation prior to the broom games he couldn't think of anything he'd done to warrant an invite. Still, proper etiquette dictated that he accept and at least make a basic appearance.
He wasn't one for swimming. There had never been time for such things growing up, his mother had always considered it an activity below their stature. He didn't even own a pair of the short pants that were required for the activity. Thankfully, he could wear anything within reason under his work robes so he had been able to dress comfortably enough for the day to avoid going home which likely would had prevented him from getting back out for the evening.
Upon his arrival at the location he could hear the noises coming from where he was sure others were gathered. He hadn't known what to bring to this sort of event so he made the faux pas of not having anything with him while knowing he's send a follow up thank you. Walking in, he nodded to the first person he made eye contact with. "Hello."