We've already mentioned this penny slot, but we'll do it again, this time in more detail. And since no one plays slots one line at a time, it's easy to end up paying quite a few pennies on each game. Many games you see labeled as 'penny slot machines' are multi-line slots where one penny is only the starting bet…for each payline. Too bad most penny slots don't cost only one penny. That's why you play Penny Slots - because they are cheap games to win real money online, and who doesn't like the excitement of top-of-the-class video slots at the cost of a penny? Anything that has to do with pennies rhymes with cheap and - in gambling - that's a very good thing. 'A Penny' is the lowest currency denomination both in the US and UK, as well as other countries around the world. These are the games that kept you busy on your first visit at a casino and, to this day, penny slot machines are games you love to play online. Penny slots are the quintessence of gambling. Best Online Casinos to Play Penny Slots - UK.Best Online Casinos to Play Penny Slots - US.The Top 10 Penny Slots Available Right Now.