I'm going to say no on that - what's the purpose of a forum arcade? There are billions of arcade game websites on the net that people can go to if they are interested in that. This is a Grand Theft Auto forum
If the games were somehow related to GTA then I think it would be alright. I used to help run a GTA website that had an arcade (called The Mod Shack, a lot will know it) and there wasn't really a purpose to it.