Even I can't drink I've got an idea:
Galactic die means take a shot
Clear in SMG1 the Luigi run in 100% and everytime you die, take a shot. It sounds very easy but it's not because there are some missions which takes many tries. Here are the missions:
Melty Molten Galaxy (especial the prankster comet which is a daredevil in mission one
Ghostly Galaxy (also daredevil but if you're not so smart the purple comet [I mean I made this mission after a "long" time I've played SMG1 again in first try
Any other galaxy with an daredevil comet
Every galaxy with an cosmic comet (cosmic Luigi is tougher then cosmic Mario)
The three challenge galaxies
I don't know any more missions, but if you do this then good luck.
Okay, my layout looks ugly.