In game wagering...who has it?

I've sat in the past at the El Cortez sportsbook as they make wagering available during timeouts. I would like to do that more often this coming season.
What other books offer the same option?
I don't want to spend all my time at the same sportsbook. I guess I should look into who manages the book and look into what other books they manage.
Just thought I would ask here first since it is Sportbook related.
Thanks I'm advance

 

I saw it at the SuperBook at the Westgate for the first time during the Euro 2016 final (won a couple hundred bucks on Portugal that way), and William Hill offers it.

As more sports books offer mobile betting apps, I suspect you will see more in-play betting at their corresponding physical locations. Worst case scenario, use the app.

 

Again, this is available here in the UK and Ireland online and on mobile betting apps for pretty much any soccer game around the world, as well as US Sports, and has been for many years. In fact we even get commercials at half time with the current in-play odds.

As William Hill is a UK company this is something I would guess they could roll out pretty easily in Las Vegas (depending on Nevada law etc)