Most people just wander around the lower area of the lift, but if you want something more than just a quick beer, it’s worth having a plan. I think you should gather as much information as possible about where to have fun, find a travel guide with interesting places to visit in Gudauri. For example, I would visit the local casino https://casinogudauri.ge/ . There, you can definitely have fun late at night and play board games.