"Activity" is one of those words that mean different things to different people.
Some people see 'Dating' as an activity.
Some may see 'Sex' as an activity.
Some people look at events as activities and will often look for a date or 'escort' when they attend those social events.
Some people may just want someone to go to the movies or an amusement park or ball game.
The choices here are friendship,marriage.activity partner or intimate encounter.
You forgot 'Relationship'.
I am "Looking for woman for relationship" as listed on my profile.
"Relationship"
can include all other choices but not always.
To me, 'Relationship' means I am open to nearly any type of interaction with a woman.
Most people that have an "Activity Partner" are usually also "Friends" but may not be "Intimate" or seeking "Marriage".
Most people already have "Activity Partners" and consider them "Friends" but not "Lovers". These are the people you call and ask if they want to go to the craft show, concert or beach with you. Gender is not usually a prerequisite.