We’ve been a couple of times, definitely some places to avoid but we enjoyed the shows and restaurants and of course the sporting events. My H has just reminded me about our 2015 trip, we did some really cool non-gambling things. We went hiking and also took a helicopter ride over the Grand Canyon and Hoover Dam. That was during a 6 week country wide trip and our time in Vegas was definitely one of our main highlights.
If he went to UNLV, he would be living on campus and too busy for much outside of study, learning lines, recovery and football 
TBF we were a bit concerned when we sent our small town Aussie lad to LA but it’s worked out really well. He’s been out in the city a handful of times to birthday celebrations etc and football games but he tends to do more things in the city when we visit which is 3 times a year. TBF, he has so much on that he enjoys his free time at home when he can rest, chill out, recover, cook and do his meal prep for the week etc
As a serious athlete, he’s 100% focused on clean eating, recovery, self-care, isn’t really too interested in going out much and drinking etc; He’s 22 and the drinking age in Aus is 18 so he’s got a lot of partying out of his system. He has loads of mates who try to get him to go out all the time but he has learned it’s OK to say no 