I'm looking for fics (or anything else?) where characters are "ordinary" fans of something and not in the roles they are in canon, or still in their canon roles, but the focus is on characters being fans.

Or, if applicable, AU of the characters in "IRL" fandom (sorry for the quotes) in any time period, meaning including fandoms for things not in canonverse. Basically how they'd interact as part of a fandom, explored a bit more than plain headcanons of "character X's Tumblr is full of [in-character thing]".

Any fandoms, including RPF. It's an odd craving, I'll take what I can get.