This study aims to describe the promotion strategy carried out by PT. Kereta Api Indonesia (Persero) to socialize the latest version of KAI Access application through the Ngopi Bareng KAI event in 2018 and the visitors' responses and find out the effectiveness of the Ngopi Bareng KAI event. The research method is descriptive qualitative type, using data collection techniques through interviews and documentation in the form of company document archives and others. In carrying out a promotional strategy, PT. Kereta Api Indonesia (Persero) uses three stages, namely planning, implementation and evaluation. PT. Kereta Api Indonesia (Persero) chose the event as a KAI Access promotional tool because it was considered to be able to embrace all levels of society in accordance with the existing lifestyle. The purpose of the Ngopi Bareng event is to socialize the KAI Access application, to make people aware about the KAI Access application and increase the number of KAI Access application downloaders. This event is intended for the general public where the public can find out information about the event through KAI's social media namely Instagram and Twitter as well as the Information Box (I-Box) at the station. The results of this research are there are lacks in the promotion strategy carried out by PT. Kereta Api Indonesia (Persero) at the planning stage is that the company only uses event as the tool of promotion and do not use other promotional tools as a promotional mix, besides the lack of budget to carry out the event and at the evaluation stage there is no evaluation of the number of visitors to the event. Through the evaluation process, the company can find out the effectiveness of promotional activities carried out. The results showed that PT. Kereta Api Indonesia (Persero) has not yet achieved the expected target by conducting promotional activities through the Ngopi Bareng KAI event.