Here is our list of the quaintest little casinos that we’ve come across that are unquestionably worth a mention: 1. However, size does not always matter, with the world’s smallest casinos often being the unsung stars of the gambling industry. Whenever we discuss casino sizes, the conversation automatically shifts to the biggest casinos and casino resorts globally. On the other side of the spectrum lie the world’s smallest casinos which, despite their size, can often match the level of service offered by their larger counterparts. World’s top casinos are renowned for their glitz, glamour and, of course, size.