Teruko & OTA
Altough Teruko could easily age herself up and go to one of the bars, she wasn't a fan of alcohol so she went to the party at the arcade. Maybe she'd play a few videogames later but it had been awhile, so she was probably rusty. In the meantime, she decided to grab a drink and something to eat.
Once she got those, she wandered a bit until she came upon the Street Fight competition. She decided that once she finished her food, she'd join. For now, she decided to just simply watch while she ate.