Besides eating and watching movies, adults can also engage in other interesting activities to enhance mutual understanding and communication. Here are some suggestions:

1. Tea or coffee: You can go to cafes or teahouses, taste different drinks and talk about each other's hobbies and outlook on life.

2. Go for a walk in the park: Walking in the park can increase the chances of getting to know each other and enjoy the outdoor natural scenery.

3. Participate in cultural activities: You can go to concerts, plays, museums and other cultural activities together to experience different artistic atmosphere and talk about each other's cultural background and tastes.

4. Outdoor activities: You can go hiking, cycling, swimming and other outdoor activities together, and exercise at the same time, which can also increase the chances of getting to know each other.

5. Learn new skills: You can learn some new skills together, such as cooking, painting and photography. Experience new things and increase opportunities for mutual understanding.

In short, the main purpose of blind date is to understand and communicate with each other. Choosing activities suitable for both parties can increase the chances of communication and get to know each other better.