Basic slot machine tips
The following are some tips for playing slots:
Never place new coins into a machine that owes you money. Often machines run out of money. When you place new coins you destroy the evidence. Rather call a floor manager to help you, but never leave your post at the machine, simply yell for help.
try to look out for banks and carousels of machines with advertisements publicizing their payout rates. Often when a machines rate is publicized it is usually a better rate than the floors average.
make sure you club card in in the machines slot and that the light registers this. Many machines are old and often need some adjusting.