The custom here is to give building porters a pan dulce or cider. I think it is a silly custom. How many pan dulces can they eat? Instead I give money. The boss of the porters gets a larger sum and then smaller amounts to other employees - based on my contact with the others and their attitude. Some have been appreciative, others act indifferent. There is a lot of corporate gift giving here. Wine is one of the most popular gifts.