Ganito yan. Kung lalake ka, its an etiquette na handa ka magbayad. PERO if the lady insist on sharing on a tab, huwag masyadong pamacho at paka rico suave. When she offers to pay, tell her no its alright you got the tab. Pero if she is persistent, then make a compromise like, "sige ikaw na lang sa desert or coffee". That way me excuse ka pa to extend the date.
Although, case to case basis din yan. Some kasi will offer to share the tab before the date itself pa.