I am sorry to say that I think it will not be a wise decision to lend money to a gambler though many times we have to lend it can make loser both the lender as well as a borrower as the gambler can lose the funds and for that reason if the person can't repay the fund then s/he can fall on a bad situation.
The major loans on this forum end up being done for gambling and few for emergency needs.
If the player wins big, they will return if they dont, they have to cough it up from next salary. Either way it does act same on the borrower and the lender both having lost. However there is no alternative to this, gamblers on this forum come to the forum loans sharks and would not want to take money from the nearest bank for gambling.
Hence these things are risky to take as loan because its gambling. Try to avoid borrowing money for it.