I was interested to visit stores that aren't open on the weekends, like Steinlauf & Stoller for notions, and Metro Textiles and Elliott Berman.
Metro Textiles just has the best prices; I picked up a few yards of clearly high-quality, navy-colored lightweight Italian wool for $12/yard and a kelly green cotton poplin for $4/yard (45").
I spent a bit more than I intended at Elliott Berman: I couldn't resist 2 1/2 yards of soft, sapphire blue linen of such nice quality that it has a slight sheen to it ($16/yard, 45"), and a printed cotton voile ($12/yard).
Joyce Buttons & Trim - a bit outside the traditional Garment District on 38th, on the other side of Fashion Avenue- was the surprise of the day:
What a great store for trims. I felt that the prices were a bit high for comparable items (invisible zippers were $2.95, compared to the usual $1 price of most Garment District stores), but Joyce's had an expansive selection of gorgeous trims that I haven't seen in other shops:
Gorgeous belt buckles and rings, lengths of beaded trims, stunning leather accents. I purchased matte gold sequins for an upcoming project that weren't for sale anywhere else.
With a few more stops at Mood, Paron's, and Fabrics for Less (I had read on Shop the Garment District that Kenneth King sources $6/yard linen here, and I snagged a few yards in navy), I got home at 11pm with bulging bags and aching feet. I wish it could be every day!