While it has become much more relaxed (e.g. no suits required anymore), some basic rules still apply, like the flip flops or shorts not being allowed.
I like this, as it gives a sense of exclusivity to the gambling experience.
This is precisely the answer that describes how the casino industry works and market itself. Even when it is different online and offline of course the exclusivity status is what gives it appeal in this age where you could just do it from the comfort of your own home.
Other people prefer the second option, where i personally lean towards. So many potential customers around today that both fit into the picture without issues.
At the end if you're going to an offline one you have to follow the rules, if you prefer an online one, as long as you don't cheat or cause troubles you should be fine.