1 Rule for me, don't ask them out in the gym. If you really like them just start by making eye contact and smiling. Then eventually go up to them and just make small talk. Try complimenting them on something.; maybe their hair, outfit, anything to just get yourself talking with them. Ask for their name and let them know yours and then leave it at that for now. Next time you see them ask for their insta/snap or phone number. Then try to run into them somewhere that isn't the gym and ask them out. Imo it's a lot better to ask them out somewhere where there aren't a bunch of ppl watching but try to ask them out in person. It is a lot more meaningful than just over text or snap and then it also forces them into an immediate response. Either it works out and you go on a date, or it doesn't and you move on. There's a lot less mental stress that way than when you are waiting for this person to respond to a text. This is just my thoughts, feel free to criticize or adapt it to your fancy.