With the wine fountain, you buy a plastic card with money on it, kindof like a metro card. You then put the card in the slot on the fountain and pick a wine and an amount that you want (1/4, 1/2, full glass) The waiter said that some customers keep their card loaded up and just walk in and go straight to the wine fountain.
I liked the fountain and it will definitely be a place I visit again just because it's fun -- however I can find wine cheaper other places so it's not a place to go all the time. I loved Oby Lee's though, because this is the type of place you can only find in a big city. Wine Fountains aren't everywhere!