Bar hopping, 6 letters
Bingeing, 6 letters
Carousing, 6 letters
Disregarding moderation, say, 6 letters
Drinking heavily, 6 letters
Painting the town red, 6 letters
Part of Santa's Giddyap! ?, 13 letters
How Peter Paul and Mary are leaving, 11 letters
Impaneled, 7 letters