TANGO1100 Pike St, 583-0382.Last Monday, I was invited to the bar in TANGO by a longtime admirer of the establishment. The admirer ordered what looked to me like a spinach salad with dark, delicate strips of duck meat. I was not hungry, but very thirsty. I asked for the wine menu, and to my surprise and joy was informed by the waiter that all wine bottles on the menu were, on Monday nights, half the listed price. This meant that a $60 bottle of wine was only $30! I ordered two $30 bottles of something that was very dry and Spanish. CHARLES MUDEDE