think of it as an expensive lesson, now you know to never gamble again
gambling is a mugs game, never gamble.
In terms of gambling, losing roughly $900 USD is a pretty cheap lesson. Its a crappy way to learn, but it could be much worse.
For the most part I agree with the never gamble part. But it can be fun to go to the Casino with a bunch of friends with say a $20 limit. It can make for an entertaining evening.