Dream About Party And Hot Tub

I was on holiday and in a house where there was a big party going on and I was going through the different rooms and people seemed to be quite drunk and I couldn't find any alcohol. I wanted to join in and I think my brother was there and his family but they were out in the town and they were texting me or phoning me to tell me where they were and what they were doing and I told them I was at the house and I didn't know where to go down to the shops to meet them or not. Anyway, I went into one room and everybody was going upstairs and I said, where are you going? And they said, we're going to the hot tub on the roof. And I was like, oh, excellent. I'll come with you. And they said, our thing has just run out of sand. And I was like, OK. And they said, we might need to get some more sand to fill it up. And they were asking if they could use sandpaper and brush the sand off the sandpaper to use in the hot tub and I said I wasn't sure if it was the same kind of sand or not but they were looking for sandpaper to fill up this hot tub that apparently was full of sand.