Compass, the world's largest catering company, is No. 1 in the food-service business in the U.K., Germany and Spain, and Sodexho has the top spot in France and Scandinavia.

FORBES: Global Services

Even so, one player, Spark Networks' chief executive, David Siminoff, 41, hopes his company will thrive by offering good customer service and by catering to small niches of singletons who are seriously looking for mates.

FORBES: Getting Couples To Click