I'd never recommend online gambling to people susceptible to gambling addictions, because it is inevitable some will be unable to control their habits, and will end up wagering more than they can reasonably afford.
Personally I'd say to try something like the free poker on Triplejack ( www.triplejack.com ), I find it as entertaining as real gambling, although you are only gambling with points.
I too would not recommend online poker to people with gambling addictions. I was purely giving players another option of gambling who enjoy a gamble, and the challenge of beating a skill based game, and who do not have this option anymore, with the true skill based fruit machines now gone.