Context. From the book. La vida de Lazarillo de Tormes y de sus fortunas y adversidades (which I'm reading for pleasure). I'm having particular difficulties with this paragraph, and would appreciate some help.
Por el contrario, muchas tienen la costumbre de irse a refrescar en las mañanitas de verano, y almorzar sin llevar nada, con la confianza de que no faltará quien las invite.
On the contrary, many of them have the habit of going there in the early mornings during summer to take the air/refresh themselves, and to have lunch without taking anything (to eat), confident that someone won't fail to invite them (to eat/share their food)?
Thanks in advance.