At our regular Wednesday evening gaming session the other night we dug out Reiner Knizia's Samurai board game and between 8.30pm and 11.30pm managed to get in 4 games!
It is a really good tactical game that seems to get more complex as you play it! The different strategies you can use to collect the winning pieces just seem to always be one step ahead of you.
Great game, well worth a try, and I keep meaning to buy my own copy (but when one of the regular group members owns it is it worth duplicating).
(Image "borrowed" from BoardGameGeek.com)