have him play lowest stakes possible unless it's money you're ok with tossing away - I'm dead serious lots of people looking exactly for guys like your husband at these places
Have fun, play poker, take it really easy for a while, don't get too involved too much, fold nearly anything out of position (if he doesn't know what position study up on game on trip over) because even if he hits chances of getting paid are very low)
More than anything just have fun - think of it as a night out and not about winning money because by the sound of this post that is only going to happen 30/40% of time.
Main thing is to really just sit down and get a read on people - see a young kid with a hoodie and headphones or someone basically disinterested unless in a hand and try to avoid playing with him most of the time - those are the low stakes pros.
Remember by law of averages if everyone was all in preflop each hand he'd only win 1/9 hands so he should be playing suited connectors, total rags or premiums. Never play penultimate hands with confidence, more money lost with AQ/AJ and JJ than probably all other hands combined. If you have AQ/AJ you either with a small pot or lose a huge one. A big hand with those usually means opponent has trips, two pair or AK but it's hard to fold because you had top pair Q with A kicker etc. Also, remember hands like JJ are just that, a pair or jacks. Now if you had JT and J6A came on board and someone bet hard you'd likely fold but for some silly psychological reason they don't when have JJ with a AT6 board. Same hand essentially but some people have a lot of trouble folding a pocket mid pair than a mid pair on the board for some reason. By total rags I mean something like 74, if it hits nobody sees it, very disguised and you can get a big payoff, it not then easy to fold - even if you get a pair. Much easier to fold a 7 then a K with a weak kicker. But pay attention to stack sizes, if stacks are <100 bb stay away from all but premiums because you miss way more than you hit so if you hit they better have the kind of stack to pay you off.
I once saw someone call all in with AK8 on flop. Guy shoved with AK. Opponent that called had JJ. He said went into a tirade of bad luck this, setup that but the plain fact is he played like an idiot just because when you get dealt JJ it looks so much prettier than it actually is. He could only beat a
bluff yet somehow because it was JJ pocket pair it didn't feel that way to him.