The few nights we were there we stayed in the casino. I don't remember winning much money but we had fun!
The two main casinos are Harrah's and Harvey's both are located right across the street from each other.
Dress Code: Casual
Rocker Sammy Hagar has brought his Cabo Wabo Cantina to Lake Tahoe. Located in the underground walk way from Harveys to Harrahs, this is one fun place. Dine, dance, and drink lots of tequila. Waitresses dressed in red leather deliver food, drinks, and occasionally dance on the bar. All in good fun!
Dress Code: Casual
The Nevada side goes CRAZY on New Year's Eve! We were in Vegas earlier in the week and one difference that was clear between Vegas and Tahoe: Tahoe has a MUCH younger crowd. Inside the casinos, you'll see many people in their 20s and 30s. In Vegas, it seemed like most people were in their 40s or older.
The giant street party that happens outside is mostly those under the age of 21, that aren't allowed in the casinos. Of course there are some over 21, but we were out there to enjoy the vibe, watch people and play in the snow.
Dress Code: If you're going to stay inside the casino, then you want to snazz up for the festivities. However, if you're going to party outside then you should bundle up and stay warm!
Go Go Dancers.
I would recommend that you pay for your entry earlier and wear the wristband, as you will save $$. Otherwise it is a US$20 entry fee, and I didn't get much use of it, since I suffered from heat stroke that day *sigh*
Dress Code: Smart casual to club wear.
Of course, the casinos on the Nevada side are THE nightlife area for most visitors. At Stateline, Harvey's is the oldest, Harrah's (my personal favorite) is a bit fancier with a great kids' arcade area. Both of these have wonderful restaurants on top with incredible views, and there's an underground tunnel connecting them so you don't have to ever see the light of day if that's your desire. The Horizon (originally called the Sahara) is bright, and Caesars is fun and brash. There's one of two other small casinos which are low-key are usually frequented by locals.
Whatever you want, it's there! Gambling, bars, shows, restaurants, health clubs, etc. It's not as audacious or brash as Vegas, but there's more than enough excitement for everyone.
Dress Code: Casual is fine for most circumstances, although you see everything from jeans to designer gowns. If you're going for the high-roller games, or some of the finer restaurants, be prepared to dress appropriately.
The only 'club' in South Lake Tahoe is Nieros, in Ceasars Palace. It gets to be rockin' on the weekends but it's not too hot midweek. The rest is easy, there's plenty of casinos to waste the night away.
Dress Code: Dress to impress at niero's. Shirt and Slacks required.
Club Nero is in Caesar's palace and is crawling with hotties dressed to the T. Good music and atmosphere.
Dress Code: Most people dress pretty nice.