Have you and your friends ever played Heroquest?
My house mates surgested that I should get a version of Heroquest for my birthday. We usually play it at least once or twice a week when we are all together its a great bonding experience. It's a lot of tactical thinking involved and a single quest can take up to 3 hours but it is a great game. We even play dungen themed music through our phone and have the game light up by candles.