Hopefully this isn't too late, but just in case you are a fan of Odd Nerdrum, the
Forum Gallery is showing new works of his until the 30th of next month. Also since you work in pastel, the
Pastel Society is located in Gramercy Park. You may want to call first to see if they have anything going on.
Then of course there are tons of galleries in SoHo and the surrounding area. Picking up a copy of The Gallery Guide would be helpful narrowing down the galleries that would be of interest to you. Hope you have a great time.