Based on the figures you have provided earlier,
you have a deficit of -$300
$500
is your take-home
pay minus expenses
-
$800
is your gambling
expenditure
=
-$300
You may be gambling
more than you can afford.
It is always good to have some spare cash every month because you never know when you may need it, be it for yourself or your loved ones. It is up to you to decide what the appropriate limits are, and stick to these.