1, some stores, such as clothing stores, video stores and audio equipment stores, can be listened to from opening to closing.

2. Radio music program host < dj>

3. Ballrooms and discos don't need so-called DJs.

4. Musicians

5, some units, such as some civil servants, have very loose positions and can be heard at work.

6. Drive a taxi, modify the stereo and listen for a day. Of course, if the passengers object.

7. Don't work and listen at home every day.