Is it permissible to break an agreement with a restaurant owner who serves halal food, but allows customers to bring in alcoholic beverages and consume them on the premises, and who divides tips in an unagreed-upon manner?

It is not permissible for the restaurant owner or the employees to allow the serving of alcohol or to assist in its consumption in any way, because alcohol and everything connected to it are cursed. As for tips, it is not permissible to take them except with the knowledge and permission of the restaurant owner. Regarding breaking the contract, if a specific work duration has been agreed upon, it must be fulfilled because the hiring contract is a binding contract, and it is not permissible to terminate it except for a legitimate excuse.