Indulging the idea that I might teach my friends Magic...

Four-player drafts tend to be done using 5 packs of 9 cards per person, which works out to be 180 cards.

Two-player drafts can go be done via:

The Overturf Draft: Set aside 112 cards. Create 8 packs of 7 cards for each player (16 packs total) . Draft 1 and pass, then draft 2 and pass, then draft 2 and pass, and then discard the remaining 2 cards.

Grid Drafting using 18 packs of 9.

Creating the standard 3 packs of 15 and drafting Pick 1, Burn 1.