Here's a "quick" game of Wizard for busy people.
For the 3, 5, and 6 player game start by dealing 2 cards to each player. Continue to deal only the "even" number of cards. i.e. 2,4,6,8,........
On the last hand all the cards are dealt out as usual.
For the 4 player game only deal the odd numbers. i.e. 1,3,5,7,9,11,13,15.
This method cuts the time in half.