It is generally accepted that playing blackjack with more than two people is not a good idea. The reason is that the odds of being dealt a hand that is better than any other hand are greatly reduced when playing with more than two people. In fact, the odds of being dealt a hand that is better than any other hand are reduced by a factor of 2.
5 when playing with three people, and by a factor of 4.5 when playing with four people.
This means that it is almost impossible to achieve a winning situation when playing blackjack with more than two people. In fact, it is almost impossible to achieve a winning situation even when playing with three people.
By comparison, it is possible to achieve a winning situation even when playing with one person if the player is able to get lucky and get several hands in a row where the cards are all good.
However, even if you are able to achieve a winning situation when playing blackjack with more than two people, it is likely that you will lose money over the long term. This is because the odds of being dealt a hand that is better than any other hand are greatly reduced when playing with more than two people.