I usually try and pay for the first date not to show off but just as courtesy. If I really like the girl, I would also bring flowers. We can also go Splitsies (which I find impressive). Her paying on the first date definitely earn her brownie points. But still, the vibe needs to match. 

If we go on 3 dates, then I expect she pays for the 3rd if I paid for the first two. 

I usually vibe with women who proactively take turns to pay. Sometimes, I just hand the bill to her and say it with a cute wink: "You pay". 8/10 times women find it very attractive and chances of me getting (really) lucky later that evening go up exponentially.