Take a drink every time Homura makes someone uncomfortable.
2 if it's a male.
Take a drink every time Allen gets offended by something on the bulletin board.
Take a drink every time Fai has a new nickname for Kurogane.
Take a drink every time Fai lies about his personal information. :p
Take a drink every time Kagura talks about Kyo.
Take a drink every time someone is creeped out because Gin smiles too much.
Take a drink every time Renji gives out brotherly hugs.
Take a drink every time Gin and Jack flirt on the board.
Take a drink every time Gin pesters someone.

and as an add on to Rhode's... "Take a drink for every time Rhode thinks about Allen Walker"
2 if it's about doing something horrible to him. D:

That's... about all I can think of... ^^;