You could always... Make your way off the New Reno map. If you can reach any edge, your companions will appear with you in the next area. Won't be easy... might not be possible.
I always loved the New Reno casino fights, they are some of the most challenging. BTW, if you can't get off the map, try to get your opponents to miss you...
*I mean, miss you and hit some bystanders; If they do, then the battle is joined, and the pimps and prosttutes start trying to knife the gangsters (and double or triple the number of targets in the room ~which greatly increase your odds).