Gaming revenue from Nevada casinos dropped nearly 3 percent in October. The Gaming Control Board said casinos won $887.6 million last month, down about 2.9 percent from the same month a year ago. Those decreases were generally reflected on the Las Vegas Strip, which is by far the state’s largest gaming market. Washoe County had a better month, comparatively: Its gaming revenue increased 6.4 percent from last year to $68 million. In particular, Reno’s gaming revenue grew 6.9 percent to $50.1 million.