Most played cards in Friends at the disco:

1 Decks
Lightning Bolt
4 copies - 4 average
Sedge Troll
4 copies - 4 average
Badlands
4 copies - 4 average
Nevinyrral's Disk
4 copies - 4 average
Underworld Dreams
3 copies - 3 average
Terror
3 copies - 3 average
Red Elemental Blast
3 copies - 3 average
Mishra's Factory
3 copies - 3 average
Shatter
3 copies - 3 average
Blood Moon
2 copies - 2 average
City of Brass
2 copies - 2 average
Earthquake
2 copies - 2 average
Sengir Vampire
2 copies - 2 average
Mana Vault
2 copies - 2 average
Uthden Troll
2 copies - 2 average
Will-o'-the-Wisp
2 copies - 2 average
Chain Lightning
2 copies - 2 average
Drudge Skeletons
2 copies - 2 average
Royal Assassin
1 copies - 1 average
Stone Rain
1 copies - 1 average