Lebanese people generally-said are very hospitable and it is not unlikely that you get invited to someone's home. In that case it is mandatory to tell them as soon as possible about your dietary needs. Don't be shy! Otherwise it could turn out in a mutual social and cultural catastrophe and a culinary disaster. Just imagine you tell them at dinner that you won't touch the pieces of the chicken or lamb they've bought or maybe even killed just for you - or imagine yourself trying to be polite and trying to eat it. So better tell them right away what you don't eat, but don't omit to tell what you do eat - veganism does not have to be about lack, especially in Lebanon. In such a situation it would come handy if you had gotten a little bit familiar with Lebanese cuisine so you could name a few common vegan traditional dishes like batata meqle (french fries), hummus, falafel, fattoush, mjaddara. This would make preparing the usual opulent meal easier for your hosts and would be the foundation for a pleasant an unforgettable evening for you.