I visited Grocery Outlet. It was weird, but I saw why it's a go-to supermarket for some shoppers.

California-based Grocery Outlet has opened more stores in the Eastern US over the past few years.

Alex Bitter/BI

• Grocery Outlet is opening new stores, especially in the Eastern US.
• The chain touts its low prices and "treasure hunt shopping experience."
• I visited a Grocery Outlet store in Maryland to see what shopping at the chain is like.

One grocery chain is expanding using a business model that's somewhere between Aldi and T.J. Maxx.

Supermarket chain Grocery Outlet promises low prices...