Kalamatiano is the national dance of Greece. If you want to dance at a Greek wedding you will need to learn this dance.
Watch this performance to see how it looks with a group:
https://www.youtube.com/watch?v=PhwG_yenH_I&ab_channel=St.AnthonyGreekDancers
Practice with this music (slow version):
https://www.youtube.com/watch?v=0fNjSrmiN7s&ab_channel=PetrosTabouris-Topic
Practice with this music (fast version):
https://www.youtube.com/watch?v=VOh9lJugKyc&ab_channel=NIKITINMUSICGROUP
Once you watch this video, watch part 2 to learn the partner version of Kalamatiano:
https://youtu.be/mEiQkUdJSd8
If you haven't watched the introduction video make sure to do that here:
https://youtu.be/bBcZFcbpM94
Here are other videos that I found helpful:
https://www.greekboston.com/music/dance-kalamatianos/
https://www.youtube.com/watch?v=_ukHl7QVwVw&ab_channel=DrewBakerDrewBaker