11 things that surprised me while touring Costco with superfans who consider it their 'happy place'

• David and Susan Schwartz are two of Costco's biggest fans. 
• The NYC-based couple has visited over 200 stores and co-wrote a book based on their travels.
• I haven't been to Costco in years. When I went with the couple, I learned plenty of surprising facts.

As my car pulled up to the Costco warehouse in Brooklyn, New York, I felt a wave of nostalgia wash over me.