First dance: At my brother's wedding when I was ten, I was one of the groomsmen paired up with an eighteen-year-old bridesmaid who was only paired with me because she was shorter than everyone else, though still two inches taller than myself.
Second dance(iirc): Homecoming of last year with my girlfriend.
Most recent dance in my memory: Last weekend at Homecoming, with my girlfriend. Not awkward at all, it was basically a tight three-minute swaying hug. We both needed it.