If talking about food:
Baked Beans; Avocados; Rhubarb.
Fast Food restaurants:
Nandos - over priced chicken that is not well seasoned. It's only the sauces that make up for bland poultry. Also, the whole restaurant ordering drives me crazy
Furniture Stores:
IKEA - regardless of what I may have planned to buy, I often get so claustrophobic that I can't wait to get to the exit - 25 minutes later having to pass through numerous sections and then the bloody restaurant