The Bible gives no number
No passage of Scripture asks whether angels can dance, whether they occupy space as physical bodies do, or how many could fit on a pin. So Christians need not force an answer where God has not given one. Curiosity is natural, but not every curious question has a revealed solution.
The phrase can help us notice a useful difference. Some questions lead us towards trusting God and loving people more deeply. Others may be clever but cannot be settled from Scripture. When that happens, it is all right to say, “I don’t know.”
Angels are God’s servants
The Bible does speak clearly about angels in other ways. They belong to God, carry out his commands, and serve his purposes. Psalm 103 describes them as mighty beings who do God’s commandments and listen for his word (Psalm 103:20).
Hebrews calls angels ministering spirits sent in service of those who will inherit salvation (Hebrews 1:14). That does not make angels the centre of Christian faith. Their work directs attention to God’s care and authority.
Are they not all ministering spirits, sent forth to minister for them who shall be heirs of salvation?
They are not simply tiny people with wings
Scripture’s angelic appearances are often striking rather than cute or miniature. At Jesus’ resurrection, the guards were shaken with fear when an angel appeared, and the women were told not to be afraid (Matthew 28:2-5). Daniel too was overwhelmed by a heavenly vision and lost his strength (Daniel 10:5-9).
Those accounts do not answer a question about a pin. They do show why Scripture treats angels with seriousness. They are creatures, not gods, and their presence highlights the holiness and power of the God who sends them.
Bless the Lord, ye his angels, that excel in strength, that do his commandments, hearkening unto the voice of his word.
Keep the main thing central
It is fine to enjoy a playful question. Still, the Bible calls people to fix their attention on Jesus. After angels spoke to the disciples at the ascension, the message pointed them towards Christ’s promised return, not towards endless speculation about angels (Acts 1:10-11).
So the honest answer is that nobody knows how many angels could dance on a pin, because God has not told us. Read the passages about angels for what they do reveal: God is active, his servants obey him, and Christ remains at the centre.