I do look forward to living more than 3,000 years, but I'm not that old.

However, every one of us have entertained angels, only not in the way Paul referred to.
Angels have been watching humans for centuries, and have been entertained in one way or other.
The wicked angels are entertained when we do things that displeases God, and of course the faithful angles are entertained, when we do the opposite.
Jesus said, "there is more happiness in heaven because of one sinner who turns to God than over 99 good people who don't need to."
Since Jesus is teaching his people, by means of God's holy spirit John 14:15-21, we can be sure that angels do not pass our way, for us to 'entertain' them... that is, show hospitality to strangers who are not from this realm.
The means by which God spoke to his servants, has changed. Hebrews 1:1, 2
The last angel to visit this realm with a message, was between 70 and 90 A.D., when John received a visit from an angel sent by Jesus. Revelation 1:1
That angel did not visit individual members of the congregation, but rather, Jesus sent that angel to the last living apostle.
This is how Jesus, in imitation of his father, operates.
There is always a chosen servant to lead, whom God, as well as Jesus, communicates the message, and that servants feeds others. Jesus uses this exact method, as the scriptures show. Matthew 24:45-47
Exodus 33:11
Thus the LORD would speak to Moses face to face, as a man speaks to his friend.
Numbers 12:8
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Whereas, all the selected men died out, the one remaining was solely given a message to dispense to all the congregations.
Revelation 1:1
The Revelation of Jesus Christ, which God gave Him to show His servants—things which must shortly take place. And He sent and signified it by His angel to His servant John,
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This is where we are at present, in regards to the angels.
We entertain angels by listening to the messages they delivered.
Consider this interesting one...
Revelation 12:1, 2
1 Now a great sign appeared in heaven: a woman clothed with the sun, with the moon under her feet, and on her head a garland of twelve stars. 2 Then being with child, she cried out in labor and in pain to give birth.
Revelation 12:3, 4
3 And another sign appeared in heaven: behold, a great, fiery red dragon having seven heads and ten horns, and seven diadems on his heads. 4 His tail drew a third of the stars of heaven and threw them to the earth. And the dragon stood before the woman who was ready to give birth, to devour her Child as soon as it was born.
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The angel identifies the dragon....
Revelation 12:9 So the great dragon was cast out, that serpent of old, called the Devil and Satan, who deceives the whole world; he was cast to the earth, and his angels were cast out with him.
However, he does not reveal the identity of the woman, and her child.
The angel does give us clues to their identity though. Those clues are found in the remaining verses of Revelation 12, coupled with Revelation 1:1, and other scriptures.
Some people think this woman is Eve, or Mary.
However, Revelation 1:1, and Revelation 12:13-17 rules out either of those.
This event does not take place until well after Jesus ascension.