Yes. Grab lines just work that they become funny if they are so lame. Which ties back into point 1. Nonetheless, apart from that, you need to positively constantly introduce your self typically and never play the role of cool, unless you are extremely experienced because you will definitely fail.
Look presentable and decent
Unlike what most people think, numerous girls respond very well to guys whom dress presentably and appear clean. Many guys who complain about girls being superficial gown like a 50 yr old uncle whenever wanting to grab chicks.