Although not directly linked to hospitality, this account in John chapter 6 has a nice application towards generosity and a volunteering spirit:
John 6:5-6
John 6:9
John 6:11
Notice the following:
The little boy saw that there was a need to provide food. Although he knew that what he had could not feed the entire crowd, his generous spirit and willingness to help motivated him to offer what little that he had.
Jesus used the provisions that the young boy had to accomplish a great miracle that fed the crowd of five thousand. Also, when John 6:11 said that "they had as much as they wanted", this likely included the same young boy that gave what he had to Jesus. His generous spirit caused him to be rewarded with enough food to fill him with as much as he wanted.
In John 6:5, 6, Jesus tested the spiritual progress of his disciples. By asking this question, he got their attention and gave them an opportunity to express their faith in what he could do. (w10 10/15 p. 4 par. 9 “Who Has Come to Know the Mind of Jehovah?”). When we are granted opportunities to show hospitality, it may be that Jesus is also testing our spiritual progress. Will we trust that Jehovah and Jesus will make sure that we will have "as much as we wanted", so long as we put others first? Or will we give in to fear and a human viewpoint and think that what we have could not possibly fit our own needs, much less provide hospitality to others?
Remember that in a crowd of five thousand people, some of whom most likely had more material resources than a young boy, it was the five loaves and the two fish of the young boy that Jesus miraculously used to feed the crowd. We should never think that what we have is too insignificant to give to Jehovah.