Agreed - To expand upon this a bit. Its been my experience that the Pi's don't play nice with WiFi/USB devices. They may work for a bit- but will drop the connection and go to sleep basically. Once I started to use the ethernet - my Pi's rock solid.
Anyway, I guess the next best thing would be a gaming adapter.
Are you sure you can't run an ethernet cable at all? That would be best - by light years. Ok, enough about that...
PS - I'm not sure I understand the need for a powered usb hub - if you're just powering the Pi, wouldn't it be cheaper just to get a powered usb plug? If you're like me, you probably have ten laying about already. They come with nearly everything you buy at this point: cell phones, iPods/iPhones, misc electronics, etc. In fact - I've had the best results using my iPhone 5 powered adapter - it throws enough juice the way of the Pi (note: the one that I got with the Pi's bundle kit directly from AdaFruit had all sorts of problems in this regard/very frustrating for a while.)
Prior to these posts, I had never heard of a gaming adapter. What benefit would it have over a dongle, better signal strength and reliability?
I was basing my need for a powered USB hub on the note found on this list of supported Wi-Fi adapters (http://elinux.org/RPi_USB_Wi-Fi_Adapters):
I would definitely prefer to run it via a hard connection. My apartment has a single ethernet jack that I use for my desktop, and I am not permitted to have a router or switch. A splitter would not allow for simultaneous access. Is there something else I'd be able to use? Should the dongle be problematic on the RPi, I guess I'd consider putting the desktop on Wi-Fi, but I'd prefer not to.