i am in Malaysia, most of the countries are free entry visa, just some times they will ask for hotel and flight ticket going back, it depends on the officer in the counter, but for visa is free in arrival for US passport 30 days
Actually different country different rules in Thai embassy, same in Thai embassy in Malaysia they asked me to have visa in Malaysia for 5 years before i apply to DTV, they tried to bring new rules not available in different countries.