The term 'Vegas Opening' is a reference to the city of Las Vegas, Nevada, which is known for its casinos and gambling. The two crossword solutions for this term are 'LAS' (3 letters) and 'SLOT' (4 letters). 'LAS' is the abbreviation for the city of Las Vegas, while 'SLOT' is a type of casino game in which players insert coins into a machine and hope to win money. Together, these two words represent the opening of a casino in Las Vegas, where people can play SLOT machines and other games of chance.