The phrase "play footsie" is typically used to describe a flirtatious game where individuals rub their feet against each other under a table or other discreet location. While this may be a lighthearted and innocent game, it's not always the best way to express romantic interest. Instead, there are several synonyms that can capture the same meaning without the potentially unwanted physical contact. Terms like flirting, teasing, bantering, or even simply conversing can convey a similar sense of interest and attraction without crossing any lines or making others uncomfortable. Ultimately, finding the right words to express one's feelings is important, but it's just as important to do so in a respectful and appropriate manner.