To say Finn loved Glee club was an understatement. He laughed, cried, and bonded in the club and he wanted to spread that kind of bond with anyone who was willing to join. However, it was right after they lost the finals so the sign up sheet was looking pretty dry.
Standing by the sign up sheet with flyers in one hand, Finn waited eagerly for anyone to sign up. Unfortunately, any time anyone even glanced at the sign up, he ambushed them with a flyer and tons of information. It's safe to say, he scared everybody away before they had the opportunity to think about joining.
You approached the sign in sheet and it was the same thing-- he approached with a flyer in his free hand.
"Hey there, you thinking of joining the glee club? Well, here's why you absolutely should," He said, clearly looking very excited.