Can you legally not hire Millenials? But more mature employees?

In today's era, the likely hood of you having to hire a under 40 something employee is more probable than winning the lottery.  You no longer can be complimentry  or kind to anyone, nor overly friendly. Doing so will cause you pain. Both in legal problems as well as sleepless nights. Case n point; March of this year, went into a local bar here in Etown, and complimented one who works there in doing a fine job with extreme precision. So was chatting with a associate about the bar the Knytes had in mind here. So this gal named Lexi overhears it, and gives me her phone number. When I followed up on that as well as mentioned other projects the club was into, she pretty much divorced both the Club and I from herself. No big, who cared? Pretty much forgot about her in view of everything else, that was going on. So a few weeks ago, was at the Legal again, chatting with one of the security guards there, and the conversation led to the discovery that Lexi, had a S-10 Blazer she might want to sell. Contacted her, never heard from her and disguarded that. So a few days ago, Church had some picinic going on at one of the local parks. With some reluctance I went. As the evening progressed one of the kids from our ward went to the swings, well guess who was there? Yep Lexi and her brood. One of many of these, but a seasoned person, might have just shrugged it all off as a teasing at the bar, and moved on. This is not the first time. Remember the little twit, at NGL a wireless internet company here in Etown? When I first got here and needed to both get online and all went to NGL since AllWest don't serve where  I hung my hat at the time. Told the little twit there that she was bright and knowledgeable. As a result of im maturity, can't get service from NGL if my life depended upon it. 
When , I'm interviewing for new hires, either for my company or the Club's radio gig, I try very hard to find the over 30 somethings preferably the mid 40's to late 50's demographic to hire from. After all, with no real knowledge of the era of which much of our programming is based the mid 70's to mid 80's, how is one going to perform or do a radio much less a TV show based on those platforms? Of course there are exceptions, I see on BlazeTV Tomi on there 22 years old, engaged to a Navy Seal currently deployed who does on helluva show. Maybe my friend Beth Ann of CSC Talk Radio ought to have her on her daily talk show and vice versa, that'd be on helluva show as well. That said, are exceptions, older women as well as men who are older, perform better, are not as jittery about off the wall humor, and have greater follow through than younger potential new hires. 
We'll be chatting on this, on today's show.
TTYLY