"At each seat was a cheap cardboard fan bearing a garish Garden of Gethsemane"
The Garden of Gethsemane is the garden at the foot of the Mount of Olives in Jerusalem where Jesus and his disciples prayed the night before Jesus' crucifixion.

Jesus and his disciples had just celebrated the Passover when they came to the Garden. At some point, Jesus took three of them—Peter, James and John— to a place apart from the others. Here, Jesus asked them to watch with him and pray so they would not fall into temptation (as said in Matthew 26:41), but they fell asleep. Twice Jesus had to wake them and remind them to pray so that they would not fall into temptation.