Dead simple 'contest' from the Guardian. Fill out your details and correctly answer the question 'I am happy to be contacted by Las Vegas Tourism in the future' to win 4 nights in Vegas:
Lady luck please let the dice stay hot
Las Vegas is the place to go if you're looking for something a bit different - the eye-popping scale of the hotels and casinos, the world-famous musicians who perform hundreds of shows a year, the sheer spectacle of the strip illuminated at night... Take your expectation of Vegas, multiply it by ten and add some jazz hands and you'll still be nowhere near the reality of the glittering city.
Luckily for you, we're giving away a holiday to Las Vegas so you could be finding out for yourself exactly how impressive it is. The prize includes return flights from London, four nights' accommodation at the MGM Grand Hotel, transfers and travel insurance. http://travel.guardian.co.uk/visitlasvegas/competition/0,,-1197,00.html
PS Don't normally give the answer but I will in this case. The answer is 'No'. :p