I use this analogy:
I use to take buses a lot in Taiwan. And i am larger then most. The seat is only so big. So I prefer to sit next to smaller people. And since I also like pretty ladies. And most of them are smaller then me, it follows that sitting next to a pretty lady will fit the bill.
So what to do? Should i sit at an available window seat and wait for someone to sit next to me (and hope that it is a pretty lady) or should i just sit down next to a pretty lady at a window seat with an empty aisle seat? Which has the higher chance of success?
Of course it can be tacky if the bus is empty and you sit down next to a young lady with rows and rows of empty seats around you
And no, i almost never talked to the ladies I sat next to and they rarely spoke to me. It was just having a pleasant person to sit next to and the goal was achieved.
FAct is you can take the signals a lady is giving you and just crack the ice. Even with some simple innocent question. If she picks up the conversation and is eager to chat with you, you are “in”. If not and shes cold after your approach. Make yourself disappear at the earliest opportunity.