We call them 'slot machines', in the UK they are known as 'fruit machines', down under (Australia & New Zealand) the are called 'poker machines', and commonly referred to as 'pokies'

The ratio of 'pokies' to table games in Australian casinos is about 11-12 to 1. That's MUCH lower than the USA, where the ratio of 'slots' to table games is in the range of 25-30 to 1.

One Australian casino, Casino Canberra, has no slots/pokies at all, only 41 table games.