In the middle of winter, up here in Canada, we heat up our gym to 85 degrees and bring in a full size pool to set up in the gym. We also use tractors and wheelbarrows to bring in sand to put around the pool and to make a full beach volleyball court. The sand is about 1 foot deep. It is a blast to clean up :). We also rent two hot tubs and have a climbing wall that is inflated and a bunch of games like pool and ping pong. Also video games are available on the big screen for those who want. It goes on for the whole night. We have many groups that use it throughout the night to bring down the cost. It is a lot of fun for our student leadership team to do!! We have a group of between 200 and 300 and it works excellent.