Many people like Ice Pub and the icebar-concept. Similar ice bars are in other cities too. You can visit a bar made entirely of ice. There you will be served a cocktail in a small glass of … you guessed it … ice.
In 20 minutes you can then cool off. There is also a DJ booth made of ice, so you can dance if you feel like it. I think it is a bit overrated but you can at least take some cool photos there.