It always warms me to hear good cold approach stories. For me, I have never seen it pulled off as much in real life and I keep reading about it working........
As for daygame, I feel like it can have a higher ceiling but it does seem quite awkward. Most people do not seem to be open to talking to strangers as much and it is tough from what I notice to go from stranger making small talk to guy that wants to be in bed with you. Like I cannot imagine how that transition would look like.
I will give you just one of many examples for me personally.
Saw a girl walking on the street. We were walking somewhat toward one another. I stepped directly in front of her (while I was still about 5-10 yards away from her). She looked up at me to understand why someone would deliberately move into her path and I put my hand up at waist level in a gentle "stop" kind of expression, smiled and said, "Excuse me. I know it is kind of odd to stop a stranger on the street but I noticed our paths were crossing and you looked like someone I would want to meet." She smiled broadly and said, "Oh, ok." So I asked her where she was going. She told me she was on the way to a friend's house. I asked her how she knew this friend and she told me she worked with her and that they were both professional ballerinas (I could tell by her body that she wasn't kidding - which is part of why I noticed her). So that sparked a deep conversation about dancing and what that's like and so forth. After 10 or 15 minutes standing there in the middle of the sidewalk with lots of talking and smiles I said, "Well I have to get going but we should continue this conversation over a drink. Why don't you give me your number and I'll set something up." She agreed and gave me her number and I immediately texted her right after entering it in so she would have mine. We went on our ways. I got busy the next couple days and didn't have a chance to reach out to her and on day two she reached out to me and asked if I was still going to schedule something. I said yeah let's go out tomorrow night at 8pm at ______ place. She agreed. We met for some drinks, had a lot of great conversation and the vibe was good. I suggested we go to another place down the street so we did. More good conversation. At one point the talk turned to music and after a while I said, "Hey we should go back to my place and I can play you some of that music I was telling you about." She agreed. We went back to my place, I played some music. She asked me if I could dance and I told her I was the worst dancer ever (I am humble where applicable and everyone likes self-defeating humor in the right amount). She asked me to prove it so I did. She told me I wasn't a bad dancer and then she danced for me a little bit, then we made out and moved into the bedroom and slept together. She ended up staying the night. We dated for a year after that. She was the most emotionally healthy and mature girl I've ever dated, which is insane for a 23yo. Most cold approaches that end in sex don't end in relationships, but this one did and so have plenty more since that's my main source of meeting women.
There is nothing special to what I described above. It's not magic. It's pretty straight forward
1. DO the fvcking approaches and stop making excuses
2. Be interested in her and demonstrate this by asking questions and occasionally relating her answers to something about yourself (this also helps the interaction not feel like an interview)
3. End on a high-note and say we should continue the conversation over a drink or a coffee or whatever and see what she says. If the answer is yes, get her number then reach out to setup a date around 2-5 days later. If the answer is no say "No worries, I enjoyed talking to you" and walk away.
4. Go out on the date. Try to hit 2 venues if possible. Base your conversation on the same thing I said in #2
5. Invite her back to your place under some pretense that will not trigger her ASD so that she feels comfortable (AKA make an excuse as to why you are inviting her over) - In the example above, I used music, but if you have a pet that's another option and there are many more.
6. If she comes back to your place, she's probably going to sleep with you. Just keep up what you've been doing and slowly physically escalate until you are sleeping together.
Had I not pulled the trigger and stopped her on the street like I did, I would have never had that incredible experience. Think about how many opportunities just like this you are passing up each and every day as your life slips by.