Play board games
Instead of spending money trying to outdrink your friends, outwit them in a board game. And yes, board games do comprise more than just chess, 'Snakes and Ladders', 'Monopoly', or even 'Catan' (although, it still almost always guarantees hours of fun strategising).
They have certainly come a long way since the classics like 'Risk' and 'Battle Shop'. Now, you can find everything from relatively simple games where you build, acquire and defend territory to multi-level adventures with plenty of chance scenarios and elements.
There are board game cafés scattered across the city, and most offer affordable hourly rates and are stocked with shelves of options from all over the world. So gather a bunch of friends, pick a game and spend the night battling over land, banding together against space creatures or outsmarting and breaking each other's codes.