Thank you to everyone who responded to the first post.  This is an echo post listing hotel security posted thus far.  The list is not very complete and I am hoping we can get at least a few more pieces of information.

Casino tower floors up to 5 or 6 you don't need a key.
Awesome rooms they are too!

Does anyone have info on Deleno.
I recall THE Hotel did not check, but I am not sure if the new owners have added security. I do know that the hotel is now NON-Smoking (of any variety).

Just keep in mind, that Security Protocol at any hotel can change on a whim.  

You can add SLS to the "keys all the time" list.

They have security at the elevators at random times through the day.  I was there a couple weeks ago and it was more during the day then at night.  They just see if you have a key, they don't swipe it.  I bet a key from a month ago would work.

I get why this list exists but I am curious if security is an issue beyond provider access. I read an online article (that was several years old) that LE in Vegas was instructing casino security how to spot providers. So I'm wondering does security care that a well-dressed (and I always request providers dress up NOT utr, just my preference.) about well-behaved providers coming to their hotel? And yes, I am aware they often won't know if she is a provider (especially in Vegas) but this question is based on when it may appear somewhat obvious--maybe a younger gal with much older man whose been at the hotel for four days and just now has a "daughter"  or security recognizes a provider from her website.   You get my point, does security give a hoot in Vegas?

I think security gives the Providers who are walking the casino floor more of a difficult time. They are probably easier to pick out than a Provider who is going straight to meet her Client.

Only in America is it weird for a granddaughter to hold her grandfathers hand in a purely innocent way.

Sunset Station - security at elevators but not intrusive
Hooters - no security or key cards
Embassy Suites by HRH - no security or key cards
Orleans - security at elevators but not intrusive
Venetian - security at elevators, name needs to be on room for access
California - no security at elevators or key cards
South Point - security at elevators but not intrusive
Excalibur and Luxor - security at elevators but not intrusive

So the Venetian checks ID in addition to key every time you enter?

Stay at Palazzo many times and they only look to see if you have a key. I would imagine Venetian has same policy since they are sister properties.  Never had any Hotel check ID and key .

Very Good Product, I highly recommend.

These are the properties I identified from my list without a comment as yet.

hard rock you need a key to get up in the elevator and a key is required for not the main tower

last time i went to the hotel before the name change they had security and wanted to see key it was in the day time

if you are staying in the more exclusive tower not the main one you need the name of guest on room and key or they need to come and get you

Cromwell requires a key at all times