I'm not from the Las Vegas area, but my friend who recently moved to the city introduced me to Kung Fu Tea and I absolutely fell in love. I love that you can completely customize your drinks, down the sweetness level. And I find their theme super cute! Both times I've gone there, they've had Jackie Chan clips and/or movies playing on the TV.
They even had little Jackie Chan action figures along the railing of the boba bar. And I found out on my most recent visit that they sell the little toys! But it comes in secret boxes and you never know what you're going to get. I'm glad that I don't live in the area because I can see that becoming a costly obsession of mine since I tend to enjoy collecting things. But be aware that the toys must be paid in cash.
They take card for all other transactions though (I believe).