From India to Las Vegas, superstitious lovebirds and numbers geeks are reveling in a once-in-a-lifetime event: the date 12/12/12. Sure, it might be just another set of numbers for some. But unlike the past 11 years, this will be the last such triple date for almost a century -- until January 1, 2101. That means one last chance for couples to get hitched on such an easy-to-remember wedding date (read: anniversary date). Those tying the knot at the Viva Las Vegas Wedding Chapel have 40 different 12/12/12 wedding packages to choose from. Six of those options include an Elvis impersonator. Others include pirate, gangster and gothic themes. "Besides a traditional wedding, the most popular is Elvis in a pink Caddy, where Elvis drives the couple down the aisle in a pink…