A hazy concert by Offset. A Gen Z model blew out birthday candles. A book signing at Gucci. The tropical bacchanal of art fairs, private dinners and A-list parties known as Art Basel Miami Beach has returned with a vengeance. Here are some highlights from Wednesday night. Disco Balls and Fried Chicken There was a long line at the Gucci store in Miami’s Design District, but this time it was for a book. Mickalene Thomas and her partner Racquel Chevremont were signing copies of their new art book, “Monograph.” Less bookish fans posed in front of neon lights and disco balls for the perfect selfie. Occasion: A book signing and…