This is the most welcoming and diverse religious group I've found in Las Vegas. I use the term "religious" loosely because many, including myself would argue that Buddhism is more of a philosophy for life and well being. Much of Buddhism does not fall under the general "religion" rules. No prosthelytizing, no supernatural beliefs or dogma and no belief in a "heaven and hell" or all-knowing higher power.
The SGI-USA Buddhist Center focuses on a particular brand of Buddhism known as Soka-Gakkai, which is the most established and followed form of Buddhism in the United States. I was told that the President of the global organization donated some of his personal money to cover much of the costs of construction because he felt the Las Vegas area was a crucial place to have a presence.
I went to the community center a few months back to check it all out. Luckily I got to see one of the monthly valley-wide meetings that everyone attends. You're likely to hear a lot of chanting, perhaps a video from an SGI presidential address in Japan, and lots of people talking about how Buddhism has improved their lives. What struck me most is the diversity. You'll find people from all ages, races, and walks of life. No formal dress code. Just come as you are.
There are plenty of volunteers who are there to explain SGI Buddhism to newcomers. Much of the day-to-day and weekly experiences involve attending smaller meetings with people in your neighborhood, often hosted at a member's home. I haven't been back much since I'm still exploring other forms of Buddhism. But those who are interested will find this as an excellent starting point.