You can simply have a good time at the sports club and at some point during your conversation, you can bring the topic up of things in general that you both enjoy doing. At that point, you can then say "Hey, I want to try out that new place we were talking about (or I was planning on going to such and such a place). You should come with me. Here's my number.". Then you give her your number. At this point, you simply wait and see if she volunteers her number without you asking. If she volunteers her number that's a good sign. If she doesn't but calls you, that's a good sign. When I say it's a good sign, I'm not saying that automatically means she's interested in anything other than friendship. She might be or she might not.
At the very least, you'll be enjoying each other's company as friends and if she starts flirting a lot, getting very touchy-feely, asking you if you have a girlfriend or doing things like accidentally bumping her breasts or a$$ into you repeatedly when you're both out or if she does something like rub your chest or lay her hand or hands on your chest for a few seconds, then you can hold her hand. If she likes holding hands with you, you can kiss her.
The idea is, you move forward non-verbally or allow her to show interest or lack of, non-verbally, without ever having asked her on a "date". This is actually a way to test her and it's also a way to notice her level of interest without ever verbalizing romantic interest. So chances of a verbal rejection are slim to none. She either fails to get together with you, or when you're together, she shows only friendship type behaviors. On the other hand, if she likes you as more than a friend, she will start with friendly/ friendship type behaviors but then she will do other things like repeatedly invading your space and she might steer the conversation to a sexual topic. At that point, you can do something like squeeze her knee gently and see how she reacts. If she likes that, you can hold her hand or put your arm around her.
If you're holding hands for a while, it's very likely she will welcome a kiss. So you just got the answer of whether she is interested or not. You also get to see whether or not you're really interested in her once you spend time with her outside of the sports club setting. This kind of approach not only minimizes rejection but it also works very well if done properly.
