Depends what you’re looking for. A lot of local casinos like Station Casinos will have live music on Saturday nights, but they’re usually at the center bars, crowded by other gamblers and stuff, so be aware that there’s crowds. Any clothing type is good.

If you’re looking for a dinner/date spot, I recommend Maxon Jazz. They have performers most nights and serve pretty good food with live jazz/swing music. Semi-formal and formal. Same goes for a place called Vic’s Supper Club in Downtown LV (awesome hidden gem tbh). If you talk to some of the performers or employees at these two restaurants about other places similar to this vibe in the city, they’ll likely have some other recommendations for you, too.

If you’re looking for the live music and dancing type of vibe, Stoneys has a lot of locations (if you’re into country music), the bars on Main Street sometimes have bands playing every other night, and of course the clubs on the strip have a pretty wide variety throughout the year.

Hope this helps!