If you are trying to meet people, it might be best to expect to say "Hi" a hundred times to get one conversation going. I don't like ulterior motives, but I might try "Excuse me, but I'm thinking of getting [what you have] and wonder where you got it, if you like it, etc." If they look hurried, don't bother.
I once travelled all day to attend a wedding, just to visit with two other guests. They had both given up on finding a partner, but they met in a book store. A comment on a book the other was choosing turned into hours of conversation, and changed their lives.
BTW, my last and best GF was a woman I met doing handyman work. She needed a major wall repair where the sun would really highlight any errors, but she lived on a main road, so I just dropped in several times to add mud and check the results. She started to think I might be interested in her, not the job. Then, we both went to an event at the HS gym. I had to be there, or I would have stayed home sick. She would have climbed the bleachers, except for a bad knee. So, we wound up sitting together.