How do you ask out someone you don't know?

Try to observe the things that she like and don't like. Simply get her contact number. Try to get close to her and if you feel that she is also getting closer to you. It will be more easy for you to invite her to hang out because she will feel comfortable to you when both of you are already close to each other before you go out with her. Try to be talkative so she will not be bored.

Just go back to that store, grab something from a shell, and say: I liked our chat yesterday would you like to have a drink with me? You already have a no, it can turn into a yes. Good luck!

do not over-think that you like them. simply continue your small talk and get the rhythm of inviting them out effortlessly in the conversation. let them feel comfortable with you and so you must be comfortable too. if they enjoy your conversation, surely they want to continue it outside the store. let them have fun in your conversation. with you the best.

You had a small talk with them a few times- so it means you are familiar with them (at least) Then, if you know them (thu, not too much) you can proceed to ask them for a coffee,lunch or snack- then, you will get to know each other well.

Start out small. Ask the person if they would like to grab lunch or invite them to the local coffee house. Try not to appear nervous if you are nervous that will make them even more nervous. With someone you don't know that well its always best to invite them to a nice public place. This will make you seem a lot less creepy. What every you do avoid coming on too strong. Sure a lot of people enjoy the bad boy image but if you haven't displayed that already don't try it now. All in all be yourself open and honest.