Vegas Confidential learned the incident took place near the table of UFC champ George St. Pierre at Surrender nightclub at Encore. Jones and former champ Tito Ortiz had a table next to St. Pierre's.
St. Pierre ordered Jones and Evans, former friends who trained together, to take it elsewhere before things got ugly.
Jones and Evans, who have been having words of late, walked away to hash out their differences.
Tension between them has been escalating since Jones said he would consider fighting Evans, if UFC president Dana White wanted the superstar matchup
Evans had taken the position they wouldn't fight each other because the friendship came first.
About 400 UFC fighters are in town for a UFC convention at Red Rock Resort.

What happens when you bring every fighter on the Zuffa roster to Las Vegas in one week? Night clubs see a surge in patrons with cauliflower ear, and tensions between former-teammates-almost-opponents boil over.
UFC light heavyweight champ Jon Jones and Rashad Evans, the former champ who was supposed to fight Jones, ran into each other at Surrender, a club in Encore in Las Vegas. The Las Vegas Review-Journal reports that the two nearly came to blows until welterweight champ and peacemaker Georges St. Pierre came between them and talked them down.
This is the latest chapter in their soured friendship. Evans and Jones trained together until Evans was injured before a planned title bout. Jones was given that bout, won the belt and then said he would fight Evans, going against what the two had previously agreed upon. Since then, they've had a war of words through the media that bubbled over at Surrender. Everyone was said to have left with a smile, so it must not have ruined their evenings.