30 Rock Season 4 Episode 18 (04/22/10)
Liz was upset when she found out that she wasn’t invited to the weekly Thursday night Thunder.
That's the time when the staff gets together to drink and give each other windmill high fives.
To prove she is fun, she offered to throw a party for Cerie’s upcoming wedding.
Meanwhile, the show riffed on the Jay Leno / Conan O'Brien situation a month later.