i would recommend drinks at the ghost bar in the palms before heading out somewhere else.
most clubs in the casino/hotels close early which means 4am or earlier.
go to drai's on sunday at 3am. it's in the barbary coast. it's a steakhouse during the day/evening but turns into an afterhours that opens at 2am and goes til noon. it's been a while since i was there, so things may have changed, although it has been the best afterhours for a few years.
check out spundae.
http://www.spundae.com/fls/lv.html
hang out at the palms and/or hard rock hotel. they're not on the strip, but they're just a short cab ride away. if you can swing a room at either one of these hotels, it'll be like night/day compared to other places. these hotels are geared towards 20s-30s crowd and the casino is like a singles bar. all of the other hotels are like geriatric and trailer trash conventions.
if you're not a hot chick, be prepared to grease the doorstaff. peeps that wait don't necessarily get in esp. at places like drai's.
if you're into sushi, go to nobu's in the hard rock. nobu is the shit! iron chef morimoto used to work under him.
btw, vegas is a town full of strippers and they happen to all get off work at 3am sunday morning. very few have church to go... enjoy
