Zach Warring has a strong Buy on Wynn Resorts (WYNN), a Buy on Penn Entertainment (PENN), and a Hold rating on MGM Resorts (MGM) and Las Vegas Sands (LVS). He also likes DraftKings (DKNG) on the web side. He says casinos are cyclical and exposed to travel demand headwinds, but thinks international demand will remain strong, even in China.