To me it is usually either classic slots, table games, or sitting at the bar and sipping a few beverages. To me, classic slots still retain their charm though, and I often times find myself playing these titles at a land casino, rather than the more modern games you will find on the floor.
With that being said, most of the classic games you will find in a casino have been replaced with more modern looking games that have more interactive features, more paylines, and huge progressive jackpots that seem to lure people in.
Classic slot machines have been popular at various betting establishments to the better part of a hundred years.