Three Village Inn
150 Main St
Stony Brook, NY
(631) 751-0555
Approx. two miles from the Math. Dept.; on the sound in Stony Brook Village.
Holiday Inn Express
3131 Nesconset Hwy (Rt 347)
Centereach, NY.
(631) 471-8000
Approx. three miles from the Math Dept; a standard Holiday Inn, continental breakfast included in the price.
Danfords Inn
25 East Broadway
Port Jefferson, NY 11777.
(631) 928-5200,
(800) 332-6367 from outside New York,
(631) 928-9082 facsimile.
Approx. five miles from the Math. Dept; in front of the harbour on Port Jefferson Bay.

You might also want to refer to the guide to lodging on Long Island for additional options.