Sorry I don’t know anyone in LI, but in case it will help with your further research, the marks show this to be by the Gorham Manufacturing Co, a good quality maker. They used a date code on holloware (non-cutlery), so if you can make out the small marks to the sides (I could not) you would have a year of production. If it is an acorn, for example, it is 1924.
The E P means it is made of a base metal electro-plated with silver, so its material value is nominal. But there may be collectors of hotel silver plate…it looks like an attractive, complete set; check ebay and replacements.com for similar pieces. Location identity, i.e. the hotel, can add some emotional value. Collectors like information, but the key is condition as, though hotelware is often a good quality because the purchaser knew it would be used often, that use increased wear on the thin layer of silver, and dents, scratches, etc.
I’m an amateur but love good design, so I hope that a more knowledgable participant of this site also answers you. Good luck.