Yard House is my go-to spot for Happy Hour whenever I'm in Vegas!
My boyfriend and I have been to this location three times this year and have yet to be disappointed. We sit at the bar so I can't comment on the wait staff but the bartenders here are awesome - especially George! Even if we don't sit in his section, he'll usually walk over to us to make sure we're good on drinks or make us cocktails to go (I highly recommend the Sunkissed Sangria and the Tahitian Moonshine).
The food here is great - several vegan/vegetarian and gluten free options on the menu. I enjoy the summer salad and the mushroom lettuce wraps while my boyfriend loves the chicken lettuce wraps and the nachos. My bf is a big guy and couldn't finish the nachos on two occasions - it's a huge plate so he asked for it to go and gave it to a homeless person on the Strip.
Dan and I will definitely be back next time we're in Vegas :)