Awful attitude and no appreciation for their customers/repeat business

NEVER AGAIN!!!!
I have been to this establishment at least 10+ times and have spent quite a bit of $$$. I will never go again. I purchased food and sat down waiting for it. When the guy (Quan) brought it to me, he stated in front of a room full of patrons in his broken English, “I cannot bring other drinks inside” looking at the bottle of water I had brought with me. I told him that I just purchased food! it wasn’t like I just walked in and sat down without purchasing anything. He persisted rudely, and said ‘No no I can’t do that!’. He was so nasty about it, and I said ‘are you expecting me to leave now?’ He said, “You better know for next time not to.” I let him know, ‘there won’t be a next time.’ These people KNOW I have been a regular customer in the past few weeks I have been there. No more. To make a huge issue out of something like this is ridiculous! Furthermore their prices are way too expensive - paying western prices in Vietnam for these food/drinks is also a royal rip-off. This place has lost my business. Would not recommend. Awful attitude and no appreciation for their customers/repeat business.