Met him at the grocery store/casual/walked past each other and we each said hello and chit chatted for a little while and didn’t exchange personal information/told him how excited you are to go to the local park right after you get home and put your groceries away/a little while later when you’re at the park, you run into him unexpectedly/ you two walked around at the park together and after you two then exchanged phone numbers/he called you Thursday night reminding you about Friday that he’s taking you out to dinner casually.