This guy asked a girl out to the prom.
The day of the prom, he goes to a tailor to get a new suit - there was a long line.
Next, he went to a limo service to rent a limo - there was an even longer line there.
Next, he went to a flower shop to get the girl a batch of roses before picking her up - there was an even longer line there.
He picks her up and we go to the prom, there is a line at the entrance.
They go to the photo shoot to get a photo together, there is a line there too.
They get hungry and decide to get food, there is a line there as well.
They get thirsty, there is no punchline.