Its tough to brew a similar beer as they're used to drinking. Cream, Blond, American Wheat, Kolsch, etc. are, IMO, the toughest styles of ale to brew well enough to pass of as commercial.
You may try coming at them from a different angle. A good amount of my wife's BMC-drinking family really enjoyed a light, chocolaty brown ale that I made for our wedding. Others have really enjoyed a fruit beer made with a LOT of raspberries.
The flavors can't be too intense, and bitterness should be at an absolute minimum.
Witbier is a nice place to start. Its not too difficult to make a good version if you brew all-grain and can get unmalted wheat.
My wife's first craft love was with a local brewery's mild, so maybe that or ordinary bitter?
You may ask if they like Blue Moon, Amber Bock, Guinness, etc. to get a good feel for their palate. Also, if they drink wine, you can find a beer style that parallels the flavor profile of their favorite varietal. Maybe even a light-colored, simple ale with grape must and honey? If they like the bubbly (or light spirits), you might try a Duvel clone.
Familiar flavors can attract the uninitiated. Chocolate, coffee, cherry pie, mole, creme brulee, lemonade. These flavors allow the newcomer to think of familiar foods rather than their expected 'flavors' in beer.