I don't have a problem if some guests wear their PJ's into the lounge as long as they are appropriate and I have never seen a Cast Member tell them they are doing something wrong. Besides they are usually there to take food back to their room and not eat in the lounge wearing their PJ's. If they did decide to eat in the lounge with their PJ's on it would not bother me, however if what they were wearing was inappropriate that's a different story.
As for taking food back to the rooms, once again Cast Members have never told us or any other guests that it's wrong. So we have taken the odd thing during the food service at 5:00 PM and the deserts at 8:00 PM. We have also taken some bottles of Beer and soda cans back. Besides we are paying extra on these floors and part of that is the foods and drinks which they offer.
Also for the record I am 22 years old and TinkerBelle_325 thank you for your nice comments.