Every big city, especially the tourist destinations, has big theme restaurants – a Harley-Davidson Cafe, a Planet Hollywood, a Rainforest Cafe, a Hard Rock Cafe. These are the kind of places where meals cost $25 per person, and the sweatshirts you buy to prove you’ve been there cost $35.

And any celebrity worth his or her salt now has a restaurant or owns a piece of one. Michael Jordan, Jimmy Buffet, Robert DeNiro, Justin Timberlake are just a few of the famous folk who no longer have to eat TV dinners at home, alone.

But you don’t have to be a celebrity, or even a chef, to open a restaurant these days. All you need is a really catchy theme. Something that makes diners forget about the food and think about what they’ll be buying at the eatery’s gift shop. These are some in the planning stages right now:

The NASDAQ Cafe: Where prices change while you eat. The wild-mushroom risotto at the Amazon.com table was on the menu at $68.22, but by the time the bill arrives, 45 minutes later, it might be $75.04. Diners will be allowed to trade what’s on their plates for things that look better at other tables. There’s no tipping, but the restaurant charges $9.99 for every transaction. Don’t forget to try the “Buy Low, Sell High Chili.”