I don't know why we have the damn thing, but somewhere along the line we ended up with a Ninja Creami whiz-bang plastic ice cream gadget (made with real plastic!) that we have used maybe a dozen times in five years. At one point, I had a craving for a "dirty banana" cocktail, but in ice cream form. Even after two or three days in the freezer, the tub of banana mush, cream, and booze (I swear I showed restraint on the amounts) was still basically an alcohol slushie. It did not blend very well.

I bet Guinness chocolate ice cream would work pretty well, though...