It was around 2:30 pm when we checked in, I chose to line up at the front desk furthest away from the autograph lounge. I smiled and gave her the tip and she said, I have you booked in a wraparound terrace suite fountain view on the east tower

We arrived at midnight with 3 adults and 2 kids. There were only 3 front desk attendants. I put the $20 dollar tip between ID and visa. The lady was very polite and put the money besides her computer and asked if we wanted change? I said slowly with my poor English if “I could get a free room upgrade?” She said she will see what she can do. She then called someone and was able to get us a room with two bedrooms, a living room and two washing rooms! The rooms had 2 queen beds and one king bed and she added a free crib so everyone could have a bed, which was fantastic! It’s our first time to las Vegas and it’s such a wonderful room. Thank you for the kindly lady and this helpful website! Good luck everyone!

Chose clerk furthest from manager.
It was 5pm.
Gave her the 50 sandwich and asked if there were any upgrades available. Told me that for 80 dollars I could upgrade. It usually cost 100.
I declined. She kept the 50 and said thank you.

Gave the 20 sandwiched between license and credit card. Clerk asked if I needed change. I replied that it was for checking if there were any upgrades and that we were celebrating wedding anniversary. Clerk indicated that they can only take tips and they will check and we are free to take tip back if we want. Clerk checked around and found a great upgrade for us – newly renovated Terrace Suite Fountain view.

Did not Target, about 3pm on Saturday, $20 in the middle which she set to the side. She offered to upgrade my room for the standard price. Asked if she could still keep the 20, I said sure. She said she give us a room with a better view, which I’m sure was subjective. Bummed but will try again.

Didn’t target a clerk. The lines were too long.

It was at 3pm. I didn’t even say anything. Just handed the worker $20 and voila! Got a Terrace One Bedroom with Fountain View. Absolutely amazing

I had two terrace studios (no fountain view), https://www.cosmopolitanlasvegas.com/accommodation/terrace-studio, booked for Sunday April 2nd til Thursday April 6th. Didn’t target anyone in particular at the check in, got a short Asian guy, gave him a 50 dollar sandwich (two rooms and plus, it’s the Cosmo). He put the 50 on the counter where everyone could see it and said he’d leave that there while he checked what he could do. Didn’t take him over a minute to offer a complimentary upgrade to a Terrace One Bedroom (no fountain view), https://www.cosmopolitanlasvegas.com/accommodation/terrace-one-bed. However, for my room I wanted a fountain view, and he offered me a Terrace Suite, https://www.cosmopolitanlasvegas.com/accommodation/terrace-suite, for 85 extra a night. Took it. He also offered a wraparound terrace fountain view, https://www.cosmopolitanlasvegas.com/accommodation/wraparound-terrace-suite-premium, for 140 extra a night (total, not on top of the other 85), but that seemed a bit too much, plus I was only looking for the view not so much the space or other ammenities. Overall, very happy with both the complimentary and paid upgrades for both rooms. The complimentary upgrade didn’t have too much of a price difference (at least if you booked direct with Cosmopolitan), but the suite should’ve been at least 200 extra a night. Also, we had booked the original terrace studios through a third party at a very discounted rate, at least a 30% discount from what I can see. The sandwich works at the Cosmo!

I checked in around 7pm on a Tuesday night for a one night stay at the Cosmopolitan Las Vegas. I used the $20 dollar trick with a mid thirties female clerk. She put the $20 on the counter and told me she would see what she could do. She made a call to her manager and ended up upgrading us to the Lanai Suite which is one of the best hotel rooms in the Cosmopolitan! It is a loft style room with it’s own private outside area with a hot tub! I couldn’t believe our luck and thanked the clerk along with giving another $20.

Attempted with $100 bill. The receptionist immediately placed the $100 back on the counter and would not accept. Offered me to upgrade from basic room to Terrace Studio for $35/night, which was about the price difference between the two.

I checked in on at 6pm on a friday night. I handed my $20 dollars between my ID and CC and asked politely if they had any complimentary upgrades and also mentioned that it was my first time staying at the Cosmopolitan. The clerk placed the $20 dollars on her keyboard and started typing and let me know that she would see if anything is available. It took awhile and she even called someone on the phone asking what she could do for me. I ended up in a terrace studio which was amazing and was much better than I had expected as I booked the lowest room type.