People have enjoyed gambling through the years. It can be a fun form of entertainment. There is the chance that one can win it big. The heart pounding action of a game of blackjack or a sports book ticket is hard to beat. There are many different ways to gamble. One way is by playing a table game. This includes games like blackjack, roulette, poker, and craps. Another way is to go to the sports book. You can bet on the major professional or college sports. One can do either a single bet or a parlay. Horse racing is also an option. Another way is to try your luck at a slot machine. The first slot machines in the modern sense were invented by Bavarian-born American inventor Charles August Fey, at the time a mechanic in San Francisco, who built his first coin-operated gambling machine in 1894. A slot machine works by wagering to see if you can win. Achieving victory is accomplished when combinations of reel symbols line up on the pay line. Let's examine the reel symbols. One is 7. This number has had a prominent role in society over the years. There are seven planets. This number also corresponds to the days of the week. There are seven deadly sins in some faiths. A phrase meant to express good fortune is that a person is in seventh heaven. The number seven also applies the wonders of the world, number of continents, notes in a musical scale, the baseball 7th inning stretch, and even the number of dwarves in the animated film Snow White.