Choosing a Spotify playlist for a dental office should consider the comfort and relaxation of the patients. Here are some suggestions:

1. "Easy Listening" - This playlist features a mix of soft rock, pop, and folk songs that are easy on the ears and create a calm environment.

2. "Coffee Table Jazz" - Jazz is often associated with relaxation and sophistication. This playlist offers a selection of smooth jazz tunes.

3. "Acoustic Hits" - This playlist is filled with popular songs performed with only acoustic instruments. It's familiar and comforting, but not distracting.

4. "Chill Hits" - This playlist includes a mix of chill pop, R&B, and indie tracks that keep the atmosphere light and relaxed.

5. "Classical Essentials" - Classical music can have a soothing effect, making this playlist a good choice for a dental office.

6. "Soft Pop Hits" - This playlist is filled with soft pop songs that are popular and likely familiar to many patients, creating a comfortable and welcoming atmosphere.

Remember to keep the volume at a level where it provides a nice background ambiance without being distracting or disruptive to conversations.