Causing Others To Do A Sin By Doing A Sin, Or A Generic Halal
The principle is, no one is responsible for the actions of others.
This is not included in la taqrabu. it is not a direct cause of Shirk like making idols or painting polytheistic pictures. eating is a causal thing. Islam allows one to marry a Christian woman who does shirk in a Muslim home. If it is allowed, inviting your friend to a meal is allowed, too. His personal acts are is his problem, not yours.
@Irfan76 sir what does he have to decide? if he knows the risk of sitting beside this female but wants to sit there to get those benefits. so I just wanted to know will this thing (sitting at that seat) be direct cause which will be prohibited for him to do? or it will be indirect cause and merely sitting still not be prohibited for him?