Chased by a security guard

Chicken licken opposite Carlton center mall. I went there it was late around 19:00 and I was meeting my partner there so we grab a meal and we eat before going to our place. While I was waiting for my partner to arrive the security guard there came to me and ordered me to leave and I politely asked him why? He said I cannot wait in there I must go outside and asked why? because we want to order and I'm waiting for my guest to arrive. He said do as said and not ask any questions.