Monopoly sucks. Ticket to Ride, Settlers of Catan, and Carcassone are good board games for people that don't play a lot of board games. And my friends and I played a game called Last Night On Earth: The Zombie Game about 6 times over the holidays. Highly recommended, that one.
Don't forget good 'ole wargames or AT games like Axis & Allies, Twilight Imperium 3rd ed, Tide of Iron.
The Valet is a great place to stoke many interests.
...gotta lure 'em in slowly
(I like both styles myself although it seems easier to get the Euros or card games on the table with people I know - next on the "to try list" is that Command & Colors Ancients if I can get the girlfriend to humor me; she really enjoyed 1960 so there's definitely hope)