Yes, a microphone is definitely useful when singing pop for a small audience. While it is technically possible to sing pop music without one, using a microphone provides a number of benefits that can greatly enhance your performance.
First and foremost, a microphone allows you to project your voice more effectively. This is especially important when singing pop music, which often features complex melodies and high notes that require a lot of vocal power. By using a microphone, you can ensure that your voice is heard over any instruments or background noise, allowing you to really showcase your talents.
In addition to helping you project your voice, a microphone can also provide a better overall sound quality for your performance. By using a quality microphone and amplifier set-up, you can ensure that your voice is picked up and amplified cleanly and accurately, without any static or interference. This can make a big difference in how your vocals are perceived by your audience, helping to create a more polished and professional sound.
Using a microphone can also help you to avoid straining your voice. Singing pop music can place a lot of strain on your vocal cords, especially if you're singing loudly or trying to hit high notes. By using a microphone, you can lower the amount of effort required to project your voice, reducing the risk of damage or strain to your vocal cords.
Finally, using a microphone can help you to control your tone and dynamics more effectively. By adjusting your distance from the microphone and the intensity of your voice, you can create a range of different tones and dynamics that can really add depth and complexity to your performance.
Overall, while it is technically possible to sing pop music without a microphone, using one is highly recommended if you want to create the best possible performance for a small audience. From improving your projection and sound quality to helping you control your tone and dynamics, a microphone can make a big difference in your overall performance, allowing you to truly shine on stage.