The Venetian has a special offer for first-time members to their Club Grazie player's club (free to join) -- earn at least 1,000 points on your first day ($1,000 playthrough on slots, $3,000 playthrough on video poker), and you'll spend that night in one of their luxurious suites.
Unlike other casinos, the player's card at Venetian (and Palazzo -- they're both considered the same casino when it comes to gaming) don't update points dynamically. You need to remove the card and re-insert (and press "Promo") to find out how many points you've earned.
Here's what else you can get for your first 500, 1,000, 2,000, 3,000, and 4,000 slot points:
500 points: souvenir, $10 slot credits
1,000 points: gondola ride, ticket to Madame Tussauds, $15 slot credits
2,000 points: two gondola rides, two tickets to Madame Tussauds, $30 slot credits, $20 food comp at food court
4,000 points: ticket to Blue Man Group, $75 Canyon Ranch SpaClub treatment, $75 slot credits, $50 food comp at food court
You can only redeem one of these offers on your first trip.
Once you hit 3,000 points, you'll later receive an invitation to the free New Member Slot Tournament, which includes two free nights in a suite.
Oh we are so jealous because we already signed up without these offers. We did about 10,000 points the first time we played and have been getting free room offers ever since.
If you're planning to do some gambling and haven't played at Venetian or Palazzo yet, this is a very good offer. Particularly if you were planning to crash at the Motel 8.