Depends on the pyjamas surely? Long legged bottoms with t shirt style top and who would know? white broderie anglaise nightie with ribbons yes it would look a bit weird! Babydoll nightie and frilly pants? Def weird. What do you wear on your feet? Wellies? Trainers? Fluffy mules? I used to rock the wellies and pj look on camping holidays for those late night toilet visits with kids
Agree with this.
Some pyjamas/loungewear don't look much different from athleisure outfits, plain jogger-style bottoms, printed wide leg trousers, oversized t shirts/sweatshirts.
Others would look a bit strange if they're obviously sleepwear. Eg. Pastel character pyjamas, bows, nighties.