I grew up playing a game we called 'Pounce'. I've also heard it called 'Nerts". In Pagat, it's apparently classified as 'Simultaneous Solitaire' and related to Klondike[0].
We played with as many as 12 players, all with a full deck of cards. All players set up similar to solitaire, with 13 cards in the 'pounce pile'. The objective was to play all the cards in your pounce pile, using regular solitaire rules, but playing on any player's foundation pile.
The game is very physical and intense. If two players can play the same card and there is one foundation pile qualified, they have to move fast. Hands collide, cards are bent, epithets hurled... It was common for players to leap to their feet, lurch across the table and body check their neighbor to play a card.
When a player exhausted their Pounce Pile, they'd holler 'POUNCE' and everyone had to stop play and take their score: Sort and count your cards in the foundation piles, and subtract 2x the number of cards remaining in your pounce pile. First player to 'X' (a pre-agreed threshold) wins.
In my life, I've never encountered another family who played this card game. Maybe you're familiar with it?
My family does this! We call the game Demon, the piles “demon piles”, and we shout “demon” to end a round. The rules are the same as you described them, except possibly that we allow “stacking” multiple cards to place them on the same common pile simultaneously; this follows the same rules as placing them sequentially, except that (naturally) nobody else can interrupt. (I can remember a time when we played without this rule, so it may be a house rule.)
I played this with my mother, and later my friends, quite a lot as a child. I'm glad you mentioned it, this brought back a lot of nice memories for me and I think I'm going to buy a few packs of cards the next time I'm out :)
We called this "nuts". Same idea, but only 4 solitaire-style piles and 11 in the "nuts pile". First to clear the nuts pile gets bonus 10 points, Kings played on the table count for 5. Otherwise all the same.
We played with as many as 12 players, all with a full deck of cards. All players set up similar to solitaire, with 13 cards in the 'pounce pile'. The objective was to play all the cards in your pounce pile, using regular solitaire rules, but playing on any player's foundation pile.
The game is very physical and intense. If two players can play the same card and there is one foundation pile qualified, they have to move fast. Hands collide, cards are bent, epithets hurled... It was common for players to leap to their feet, lurch across the table and body check their neighbor to play a card.
When a player exhausted their Pounce Pile, they'd holler 'POUNCE' and everyone had to stop play and take their score: Sort and count your cards in the foundation piles, and subtract 2x the number of cards remaining in your pounce pile. First player to 'X' (a pre-agreed threshold) wins.
In my life, I've never encountered another family who played this card game. Maybe you're familiar with it?
[0]https://www.pagat.com/patience/double.html