Couple of questions for you:
How long are you there?
What do you want to learn and what currency can you leverage that will benefit someone else?
Your age lists as 29. So you have friends/acquaintances who sound like they are into the party scene. While that has its appeal it also can pull people down into chaos and destruction. This you must avoid at all costs. If you cannot be around the party scene without falling victim to its influence then you MUST distance yourself from it. When I was in the nightclub scene I was around those influences constantly, but I never felt a need to partake, and people learned that about me & respected that about me. Even so, I had to distance myself from some people as well in those days. Like a person who panics in deep water & starts drowning, there is immense risk to anyone who would try and save that person. Therefore it is best to maintain healthy boundaries to avoid being dragged under to your own demise.
Not kidding.
Vegas is all about 2 things: Money and influence (aka who you know). You have to understand that those things are what "Vegas" values. And if you decide to start moving in those circles of influence, you'll need to learn to dance with some devils without getting drowned and you'll run into all sorts of unspoken covert social contracts you'll need to navigate.
The best way to gain exposure for someone without money is to work within the service industry. If you work in the service industry and you get on somewhere (as a dealer, bartender, high end server, doorman, bouncer, etc.) then you can begin to study and learn the game that IS Vegas. You can observe successful people and gain proximity to them.
Yes you can play golf. Yes you can go to the bar/lounge at Delmonicos or the SW, yes you can go to XS or any of the high end clubs, but you already need some money to go that route, and unless you already have some level of financial success (and the skillset to have obtained that financial success) you will not have much currency to conversate with those more successful than you.
So that route is likely expensive with poor return on your investment of time/money.
Unless you are excellent at flattery/brown nosing and charm, there are some people whose egos are susceptible to that, but any reasonably successful person will recognize that tactic no matter how smooth you are....its because part of how successful people become successful is reading others and negotiating well.
There do exist altruistic people who want to mentor someone and pass along what they know. But you gotta bring something to the table to be worthy of the time investment a mentor would make.
What do you bring to the table?