21 Restaurant & Lounge, Las Vegas

21 Restaurant & Lounge not only embraces a late-night hotspot's hours – 6 p.m. to 5 a.m. – but also its club-like ambiance. According to Las Vegas CityLife, internal LED lights lend 21's clear white tables a "sci-fi vibe." More earthly sights arrive on 21's Korean small plates, from spicy rice-cake skewers and sea snails mixed with veggies to what CityLife considers "perfectly fried" wings.

An extensive selection of beer complements feasts, as does soju, a Korean liquor served solo or mixed into fruity cocktails. By 2 a.m., 21 transforms from club-like to full-on club with bottle service and live entertainment in the form of DJs, karaoke singers, and a guy who can go a full minute without blinking.