Well, that's the only mistake your friend made; he went back to gambling, and the money he used in the casino came from a loan, which was wrong and a big mistake in my opinion. Instead of reducing it, it added more problems for him.
It is said, right, one debt cannot be resolved by another debt; you must think of a different solution to pay off the debt, and that is the other strategy that can raise money that does not come from the debt.
He will difficult to repay the loan from another loan because that will be looks as a circle that will never end. He made a big mistake from the first time because he take a loan. Many people gets that experienced, especially people can find an online debts easily that can gives them the money.
That online debts makes them in another big problem, especially if they can not pay the loan. If someone is not involved in any debts, he must must stay away from any of that, especially if he doesn't have a source of income. He must trying to manage his finances than take a loan so he doesn't have to gets the problem from the loan. If he is sure that he can handle the loans, he can try that but he doesn't have to use the money from that loan to playing gambling.