Cashman Center is an okay spot for local conventions and services. I've been here about 3 times for the following: community service program that compiled holiday gifts for families in need, Culinary Health Insurance processing when I was still able to take advantage of my father's plan, and recently for Bridal Spectacular.
I honestly think it's a good space for the previous 2 types of events that don't call for appearance, but it kinda didn't suit the bridal event. I guess the convenience of the location is what helps the local crowds (e.g. being a more central point in the city).