Here's a list of some
late night Las Vegas activities. If you like bowling there's a 24-hour alley.
You might also check out
Late Night at the House of Blues (inside Mandalay Bay). I don't know what time they close, but since they call it late night I imagine you'll get an hour or two of show before they wrap up. Double check the dress code.
Originally Posted by
ajc1970
another decent dueling piano show done by gorgeous twin sisters at Harrahs on the Strip
A few months ago I saw the piano show at Harrahs and it was two guys. I never saw the twins. But the two guys were hilarious and really knew how to work a crowd. Really worth seeing and totally free. ^
There's a 24-hour Starbucks inside the New York, New York Hotel & Resort on the strip.
Pretty much everything else is going to be nightclubbing or gambling-type activities at that time of night...
And of course there's free wifi everywhere in the Las Vegas airport, so if nothing else interests you, there's always Flyertalk.com.