Monday assorted links by Tyler Cowen May 2, 2016 at 12:03 pm in 1. Arbitrage against gay dance clubs (NYT). 2. Improving password fields: small steps toward a much better world. 3. Armpit sniffing as the new frontier in assortative dating and mating. 4. How St. Louis became a major chess hub. 5. Incompetent robot waiters in China.