Horrible dining experience

My two friends and I went out for lunch at the pavilion to celebrate her engagement. We decided to visit elephant and co. Firstly we were not able to sit at the table with the sofa because it was a table for 6 (it's was at 11:30am with about four other customers) fair enough we woke up to sit outside, only to be told it was a drinks area. We then proceeded back inside to be seated, were we then put a small crown that said bride and a sash on my friend just to commemorate the day only to be told that it was Not Allowed. As infuriating as it was we still stayed and removed the items from her, complementary drinks were given. When it came time to order our waiter said that he was unsure if they have what we ordered from the menu and went back to check. He came back and said that everything was fine, a few minutes later we get another waiter coming to us to say that they don't have one of the items we order. Complementary drinks or not, we had had enough and decided to move to olive and oil next door. When we entered we asked if we could put the crown and sash on my friend and we received a yes. Once seated the same man came to us and said that his manager said that they don't allow it and asked for us to remove it. Imagine a simple sash and crown! So we asked him how do they allow birthdays at their restaurant but can't allow a group of 3 people with one person wearing a simple crown and sash. All we got for an answer was, unfortunately it's not allowed (wow, clarification at its best). We removed the items and decided to grit our teeth and stay as to not make our friends day worse. During the meal, we had a young boy running around jumping on the sofa while customers ate. Seems to be someone's kid who has influence in the restaurant as the waiters just straighten the toppled items and didn't say a word to anyone. I had a feeling that it was too much of a coincidence that we had such a bad experience at both elephant and co, and the olive and oil. It was strange how we were allowed to use the crown and sash and then all of a sudden asked to remove it. We then asked our waiter if the restaurants are somehow linked to which we got a yes. Double standards are unreal and an altogether terrible experience.