This paper presented the results of an experimental study investigating the impact of clicker use through a smart phone application called Kahoot!. Despite positive results of clicker use in the existing General English literature, the impact of clicker use has not been examined in the field of ESP. To address this issue, this study investigated the effectiveness of clickers by comparing pre-test and post-test scores of a control and an experimental group and the scores of male and female participants in the experimental group. The results of a 10-week implementation of clicker use with the students of tourism and hospitality department in the experimental group indicated that while post-test scores were significantly higher for the experimental group than for the control group, there was not a statistically significant difference between the post-test scores of male and female participants in the experimental group. Implications for teaching ESP with the help of technology and suggestions for further research were also provided.