Beer Float (no root)

When I was in college, I was in the library one day and there were a group of guys studying at the table next to us. They went on and on for like an hour about how cool a beer float would be and how they should totally do it someday dude. My friends and I went on and on for almost as long after they left making fun of them. Their float was to be something like Old Mill and the cheapest vanilla ice cream they could find (Or maybe we should put it in a blender and make it a shake. That would be so cool.) However on the Apartment Therapy blog they had a post about beer floats I could get into. Citrus flavored IPA with vanilla ice cream (could go either way), creme brulee stout with espresso ice cream, and chocolate stout and coffee ice cream. They also talked about a Guinness milkshake. I'm thinking maybe a porter with an espresso ice cream could be good. Maybe some day when I'm feeling extra brave. Who knew the annoying frat boys were on to something.