What to wear at script read-throughs.
You don't want to look like you're keeping an eye on people, so don't dress too smart. But then you also don't want to look like a tramp, so don't dress too casual.
It's usually your first time meeting the actors, and you want to make a good first impression, but everyone else will be there too, and they *know* how you normally dress, so anything too different and you'll get comments. You don't want comments. Comments make you stand out and people will Look At You.
I usually pick the most presentable version of what I normally wear, which is jeans and a t-shirt, with a shirt on top that can be removed if it's too warm in the room. And then I change it 3 times, at the last minute.
Hey, we're writers, we obsess over pointless, tiny details. This is just one of many, many things we worry about that we don't really need to.