I find the bar/restaurant at the opposite end to the lounge at LAS T3 to be a better place to hang out while awaiting boarding.
How funny to stumble upon this thread, sat here as I am in Las Vegas for a few days, with the updates coming in above from wanderingjock and CWS (departing with Spirit? though surely you missed out on the Raiders game

)
FWIW, the Sphere and the F1 (and the Feb 2024 superbowl) is creating quite a buzz here. The I-15 is a mess though. I came in via California, the lovely Route 50 across Northern Nevada and then south from Utah. As ever, Las Vegas is a change of pace from all of that.
I still don't like the post Covid Car Hire rates or trust the transportation to the rental facility at LAS, so will be driving to LAX to fly out.