Asian party platters in Gaithersburg?
I highly recommend Seven Seas in Rockville for event catering and party platters. The owner, Mr. Shen, is very accommodating and the food is great.
Other options could be Maxim and Kam Sam Markets in Rockville. If you're looking for a good price and decent food, you can also try the Chinese buffets such as City Lite in Gaithersburg, Bamboo and Tyson's Buffets in Rockville.