I would TOTALLY watch the background characters in a romcom movie!
Here’s how this works in my head:
We open on an Obvious Romcom Premise. A bunch of women having a post-work drink, probably celebrating one member of the group being engaged. The Obvious Romcom Heroine is, say, discussing the massive crush she has on … some kind of local celebrity. The weather man from channel 7, let’s say. And saying other Romcom Bait things like “maybe I should just give up on men” or “I’ve been chatting with this new guy on a dating site, he’s pretty cagey but I think he’s maybe worth a date,” yeah, we’ll go with that one.
Her friends, sensibly, are going “honey, guys who are cagey are probably not a great plan, get a non-dick-pic picture out of him please,” before one of them realizes and unwisely points out that the weather man is *gasp* in the bar as well!
Obvious Romcom Heroine goes to, obviously, have a meet cute with the weatherman and embarrass herself terribly … but the camera stays on her friend group and specifically the one who pointed out the weather man, who is like “I immediately regret this, I take back everything I just said about the online dating dude.”
The rest of the friend group mercilessly nominates her to rescue Obvious Romcom Heroine from whatever situation she’s managed to get herself into, and she has A Moment with the friend the weather man came into the bar with but it gets interrupted by The Romcom and they almost immediately part.
And then comes a romcom that happens around the Traditional Romcom Beats! Obvious Romcom Heroine attempts to track down Weather Man, and her friend ends up apologizing to Weather Man’s friend about the stalking and they get coffee before having to drag their respective friends apart. When the Big Misunderstanding comes, our heroine and the weather man’s friend have to grapple with whether they want to be loyal to friends or test out the romance they’re falling into.
Basically, an hour and a half of acknowledgment that Romcom Heroines (and, indeed, Romcom Heroes) would be that disaster friend that people are fond of and entirely bemused by, with a sweet romance in the foreground where most of the ridiculous drama happens because of leak-over from what would be the main plot in another movie.