The .lv top-level domain is meant to evoke the bright lights and allure of Las Vegas. Needless to say, it doesn't actually mean that the site is run out of Vegas or indeed has anything officially to do with Sin City.
The .lv extension actually is the country code for Latvia. This country doesn't really have anything to do with Cafe Casino either, but it's certainly understandable that the gaming corporation wishes to take advantage of such a fitting domain for its website.