Activity partner rules are that there is no romantic connection, it's not a date. For example: If you would go to the museum with one of your same sex besties, and then luch or dinner afterwards while you each Pay Your Own Way...rhats an activity partner. If the guy is picking up the tab for everything then you are treating it as a date.
Idk what my single sisters out there are thinking but men are simple, & need simple clear instructions. If you don't pay your own way, & let them "take you out" for whatever, don't blame them when they then think you are dating them and they're gonna get some...I consider my self a don't blame the victim kinda person, but really ladies, we often do the most damage to ourselves...
I don't agree with your comments here, most guys do not need instructions on how to behave, and regarding this statement :-
" If you don't pay your own way, & let them "take you out" for whatever, don't blame them when they then think you are dating them and they're gonna get some..."
Most guys are satisfied with the female company and maybe hope to go out with them again, whether he pays or not, and in some instances maybe hope something more romantic could develop in the long term by building on the friendship.
Welcome to Mingle2 and good luck in your search.