Read more: Inside story on Charlie Sheen’s porn star Christina Walsh
 SEE PHOTOS - Christina Walsh aka Capri Anderson's Photo Gallery 

According to gossip website TMZ, the ‘Two and a Half Men’ star and the women – who are in the US gambling city for a porn convention – went on an “epic bender” at The Palms Hotel and Casino, before heading back to his hotel room.

One of the women involved is Bree Olsen and sources claim Charlie is infatuated with her and spent some quality time with her in her hometown of Fort Wayne, Indiana, before they flew out to Nevada.

A source said: “Charlie is smitten and he decided he wanted to spend some quality time with Olson.”

The drinking session comes after Charlie fired his sober coach, who had been hired after he trashed a New York hotel room and was found naked by police.

A source said: "The sober coach never went back to work for Charlie. He has not heard from Charlie since he told him not to start New Year's Day (01.01.11)."

The hotel room incident capped off a bad year for the 45-year-old actor.

Following a fight with his estranged wife Brooke Mueller – mother of his 21-month-old twin sons, Bob and Max - on Christmas Day 2009, he paid a trip to rehab and received a 30-day suspended prison sentence for misdemeanor assault.

During his New York trip to October, Charlie was accused of causing $7,000 worth of damage to his hotel suite after tossing furniture around because of the monetary demands of the escort.

Before the alleged incident, the actor - who was enjoying a mini-break with his ex-wife Denise Richards and their daughters Sam, six, and five-year-old Lola - was reportedly found by his assistant naked and covered in cocaine in a restaurant toilet.