Tsai CITY venture development participants, Constantine Polychronopoulos (YC '25) and Coby Wagonfeld (YC '26), founded Crew Dog, a unique collegiate apparel brand blending traditional school pride with modern, minimalist designs. Since its launch, Crew Dog has expanded to partnerships with over 400 student groups, selling 8,000+ items, and securing licensing deals with major universities, including Yale and Georgetown.