DonDiego just searched some websites claiming to know where Laughlin wi-fi hotspots are. The results:
__Starbucks in the Aquarius casino [Research suggests this has been replaced by Duet Coffee and Wine, but still offers free wi-fi.]
__Old Town Saloon on Casino Drive above Harrah's
__Casa Serano restaurant across from the Riverside
__IHOP in Bullhead City just south of the bridge
DISCLAIMER:
As usual DonDiego does not stand behind these results; he's just doing the best he can from 2000 miles away.