American Casino & Entertainment Properties LLC rode a strong quarter at its Stratosphere property to a 5.3 percent increase in revenue and a 15.9 percent climb in cash flow. The company, which operates the Stratosphere and two Arizona Charlie’s properties in Las Vegas and the Aquarius in Laughlin, on Wednesday reported $89.3 million in consolidated net revenue for the fourth quarter, which ended Dec. 31. That compared with $84.8 million for the same period in 2014.