Group 1 - The article discusses a unique coffee-making course offered at the Huangpu District Senior University, which consists of only four sessions with a maximum of 12 students per class [1][2] - The course covers essential coffee knowledge, including the differences between Arabica and Robusta beans, and practical skills such as making espresso and milk frothing [5][20] - The instructor, Wang Hao, emphasizes safety and encourages a relaxed learning environment, allowing students to ask questions and learn at their own pace [17][50] Group 2 - Students come from diverse backgrounds and have varying levels of coffee knowledge, with some being complete beginners while others have prior experience [39][40] - The course structure allows for hands-on practice, with each student having access to their own espresso machine, fostering an engaging and aromatic classroom atmosphere [12][26] - The article highlights the social aspect of the course, as students not only learn skills but also make friends and share experiences, contributing to a sense of community among retirees [25][51] Group 3 - The instructor adapts the curriculum based on student interests, sometimes incorporating additional topics like coffee equipment or hand-brewed coffee techniques [18][19] - The course has been well-received, with students expressing satisfaction with their progress and the enjoyable learning experience [44][46] - Future plans for the program include the possibility of offering more specialized courses, such as latte art, to cater to the interests of the students [50]