It's the games in the traditional casinos that are more addicting because a player has more interaction with real people. You could talk to fellow gamblers who can eventually become your friends. I think it's the interaction with people that makes gamblers come back and you get to share experiences on table games.
Traditional casinos and Sports betshops are less addictive compared to online casino and sport bets, I will tell why it's so;
Online gambling is with ease and simplicity in carrying it out as a gambler with just a click on your gadget screen in your comfortable position you can gamble as much and long as you want and there's something about comfort and less noisy places while gambling, you get carried away that you end up gambling beyond how you had planned to,
but for in-house gambling only the distance covered to the gambling house can be discouraging some times particular under a hot weather and you just decide to cancel your gambling for that day, even the noise from within other gamblers and machines in the house can make you uncomfortable that you don't have to spend much time as you would comfortably gambling online within your closet.
Another argument is that, online gambling gives privacy to gamblers specially to those gamblers that seek to keep their gambling habit private. And there are many found under this category, etc.
The online casino games will be the second since you are offered unlimited rewards, and you can win big up to the jackpot especially the slot. But even in offline casinos, the slot is already addictive.
The tradition comes in second position from what I have explained above, notwithstanding all patterns of gambling are addictive and people should consciously fight to resist any form that which the addiction can be gotten.