The Bible is filled with multiple passages concerning prayer. Some of these speak about the attitude we should have, topics to bring before God, and more. All of which are good to consider, but one question we may still have is whether or not it is okay for us to pray publicly before eating meals. This cannot be answered with a straightforward "Yes," or "No." Especially since Jesus taught against praying publicly in some contexts.
Being a disciple indicates that they were being taught. As they learned, they were traveling along the Way of Christ, and did not deviate from it. One impressive thing about them was that they were willing to be persecuted by others for their faith. Despite their terrible treatment, many were willing to be bound with chains and sent to far off cities for the name of Christ.
Paul's boldness was remarkable. He preached the Good News of Christ to Jews and gentiles alike, regardless of their economic or social standing. He taught the poor and rich, men and women, Jew and Gentile. He declared the resurrection of Jesus Christ to kings, and others in authority. All of which was without shame or embarrassment.