Final answer:
To determine the number of Malbecs on Trez Art and Wine Bar's wine list, one would need to directly consult the bar's updated wine list or their official resources, as wine lists can change frequently and are specific to each establishment.
Step-by-step explanation:
Knowing the number of Malbecs on the wine list at Trez Art and Wine Bar requires access to their current wine list, which could vary over time. Wine lists are curated based on various factors, including seasonal availability, customer preference, and management selection. Since this question pertains to a specific establishment's inventory, it cannot be answered accurately without the latest information directly from Trez Art and Wine Bar. The best approach would be to contact the bar directly or visit their official website if they have one available. For educational purposes, remember when analyzing a wine list, a restaurant may offer a diverse selection from different regions to cater to varied tastes; Malbec, being a popular red wine varietal, is commonly found in wine bars but the exact number would be specific to this establishment.