To many people this is "Klondike", the way they always play it. It's more of an alternative rule than a variation.
One deck of cards
Object: Play all cards to the foundation.
Tableau: 7 piles.
Rank is built down. Cards must alternate suit color.
If a pile is empty, you can play a king.
You can pick up and play a group of cards.
Stock: Holds the 24 undealt cards.
Plays 3 cards face up to the waste.
When the stock is depleted, the unplayed cards are returned face down to be turned from the stock again.
Waste: Discard pile.
Only the stock can play to here.
You can pick up and play the top card.
Foundation: 4 piles.
Play "ace" cards to empty piles.
Rank is built up. Cards must match the same suit.