Greetings!
I have included huge, luxurious market-places in various cities and metropolises in my campaigns. Long ago, I was inspired by the historical examples of the Roman Empire's Hadrian's Market, and the vast market-places that were established in the cities of the Song Empire, in China. Hadrian's Market, for example, was seven stories high, and included hundreds of shops selling trade goods from the far corners of the Roman Empire and beyond. Hadrian's Market evidently could embrace 10,000 or more people, gathered together and shopping all at once. Just imagine what it was like going shopping in such a magnificent place!
Do you have luxurious market places in your campaigns?
In my own Thandor Campaigns, I have found them to be a great resource and setting, for goods and equipment, but also roleplaying, socializing, developing plots and adventures, and more. The players love going to these kinds of places. As a DM, I find such environments are very flexible, and really offer many different kinds of roleplaying opportunities and adventures!
Semper Fidelis,
SHARK