There are 2 types of "Meals" that should be eaten in a Succah (see below what doesn't need to be eaten in a Succah):
1. A meal which requires the Brocha of Leishev BaSuccah to be eaten in the Succah, This includes:
Bread (made of the 5 grains) with the volume slightly larger than an egg (Shulchan Aruch OC 639,2 explained by Magen Avraham) even if eaten as a snack
Cake or biscuits that are made of the 5 Grains (wheat, barley, spelt, rye and oats) which one is kovea seuda i.e he would personally eat it as a Meal (see Mishna Brura 16 quoting Maamar Mordechai ), this would include having Coffee with cake for Breakfast which is considered nowadays a meal, likewise Kiddush after Shacharis on Shabbos morning with biscuits and cake would be considered breakfast meal.
2.A meal which should ideally be eaten in the Succah (Mishna Brura 15) but one does not make a Brocha Leishev Basuccah:
Fruit, meat fish and any foodstuff which is eaten as a fixed meal without bread
Bread which is only the volume of an egg or smaller
Cake even larger than the volume of an egg for a snack when its not a fixed meal
Wine drunk as a fixed meal
If one eats Fruit, meat, fish, wine or any non 5 grain foodstuffs as a snack throughout the day without sitting down to make a meal, The Mishna Brura OC 639,2 15 says:
שלא בקביעות אין להחמיר כלל - Without fixing a meal one does not have to be strict at all to eat in a Succah.
So in your hotel during Chol Hamoed it is possible to constantly eat snacks of non 5 grain items.
Obviously if a Succah becomes available its an opportunity to fulfill a Mitzva of eating properly in a Succah which one shouldn't miss.