Hey, welcome!
Damn, I’m jealous.. Vegas!? 
Take a quick look at this - It’s my first ever pheromone experience!
I’ve had the most success with Instant Shine, on it’s own. The effects were so ridiculously obvious! Second to that, Instant Gentleman seems to be making its mark on my list.. I’ve just gotta do a little more testing!
Could you tell us a little about your personality, who you’re looking to attract, where you’re planning on using pheromones etc etc.? Doing so will get you some great advice from the experienced members, and also the $25 GC as promised! 
I was a little reluctant at first, but when I had the experience that I linked above, I had no doubt that they work. You’ve just got to have realistic expectations, and the knowledge that you also have to play your part - initiating conversations and such..
Good luck!