Well if you have your idea to us, sooner rather than later, you can use that as additional evidence to support your character's contribution to the Cartel. ;)
You're more than welcome to use the Calrissian Hall, which has several bars and closely resembles many of the big major Casinos in Las Vegas, NV. It has several bars, scattered all throughout the joint.
With respect to the other Casino, The Paradise, its not finished construction ICly yet, so unfortunately we can't RP there! (Not yet anyway).
So yeah, use Calrissian Hall, its the biggest Casino on Nar Shadaa, and a well known hangout for Cartel members.
Also; PM me your idea for the asset and we'll see what we can do!
Oh I see, I'm sorry I only skimmed it before. Okay how about this: whoever takes the bounty has to contact you so that you guys can work something out...could be interesting for a story.