It looks like your desired hotspot supports 802.11b, 802.11g or 802.11n. So as long as whatever wireless adapter you pick has one of those (I would go with g or n) it will work.
There are tons of choices out there. I suggest going to www.newegg.com
and searching through their wireless adapters. You can filter your search by price, 802.11g or n, interface (PCI, PCI-E, usb...), or other options.