I have mixed feelings about gambling.
On the One hand, Los Vegas has one of the highest Suicide rates in the country, you can see where Gambling, Drinking, Smoking, Drugs, and a host of other sins tend to culminate around one another. I've also felt personally ignored by my boyfriend when he was playing online Poker frequently, and worry that he'd become addicted, and wonder how that'll affect us in the future.
On the other hand, Bingo and other chance games can be kinda fun. It's most fun to me when there's actually no prize at the end, when it's just for fun. Like a board game such as Chutes and Ladders or CandyLand. Most gambling doesn't require a great deal of mental alertness. Kind of why parents play things like CandyLand and Chutes and Ladders - Anyone can win.
On AOL, Mom and I used to play "Slingo", a combination Slot Machine and Bingo Board. It was very fun, there was nothing really at stake. I just kinda liked the jingle of coins when you won :3
If you want some scriptural backing, as it's not speficically mentioned as a sin...
1 Corinthians 6:12 All things are lawful unto me, but all things are not expedient: all things are lawful for me, but I will not be brought under the power of any.
10:23 All things are lawful for me, but all things are not expedient: all things are lawful for me, but all things edify not.
That which is not explicitly sin, is an area of gray which is a matter of
personal choice. This includes Smoking, Gambling, Drinking, Watching TV etc.
But if you are of Christ, then it should be something that does not rule you (I will not be brought under the power of any).
Also, though it's not bad to do, it doesn't necciccarily profit you anything - there is no gain or Glory for God in it. (but all things edify not)
And also...
Romans 11:11 For it is written, As I live, saith the Lord, every knee shall bow to me, and every tongue shall confess to God.
12 So then every one of us shall give account of himself to God.
13 Let us not therefore judge one another any more: but judge this rather, that no man put a stumblingblock or an occasion to fall in his brother's way.
Let's have an example of this as a Gambler andex-gambler. A Brother is Saved, and he was addicted horribly to Gambling. Though he's saved, he still feels like he could fall into that trap again. His Gambling Brother should not intice him to gamble, or gamble around him as it puts a stumbling block in his way. Like offering a drink to an ex Alcoholic. Some brothers or sisters in Christ might not have a problem with that, but for the brother that does, out of respect, you shouldn't do what was his sin in front of him.
My Father used to Idolize the Beatles, since he's been Saved, he's grown to despise that. The Beatles were his gurus - and it's hard to forgive that when John Lennon said that the Beatles were larger than Jesus. I still like some Beatles Music, though for his sake, I don't listen to it at home.
I know some Christians who don't celebrate Christmas because of the Paganism in it; that's fine. It's a matter of Conscience. But if you do any of these things that is questionable, and another christian does not - don't look down your nose at the other thinking "Oh I'm better than him/her because I do/Don't do that thing."
Obviously, if you see a Brother or Sister that is doing something Obviously Wrong or Sinful - Correct them on it; you do have a biblical obligation to do so. Following that; it is within the right of the Church to excommunicate a brother who refuses correction which is biblical - such as a Brother with an alcohol problem who repeatedly screws up; those people give a bad name to Christians and Christianity, and are (whether saved or unsaved) Spiritually Blinded.
What you do with your money is up to you. I've heard enough sermons on being stewards of God's Money and using it wisely - So, my Dad gave me a suggestion, that what money I use toward Video games etc. that I try to match that with whatever I offer at Church.