Both actually for me is the same so I will not choose between those but for more convinience, I say online gambling. With online casino you will not need to go out and drive the car to go in a casino in the middle of the night just because you feel like you want to waste some money. When it comes to the game though I must say that offline casino are still the best since I think online gambling sites, has some kind of program that every gamblers will eventually loose every money they have in their bankroll.
Online. Offline gambling is more for the older people. I like it to do, but it is not good to do that much.
Otherwise if you lose than you lose a lot of money and that cant be good.