Is there a problem with the paintball activity? I picked up a paintball gun for my doctor character, and only had the option to use it a couple of times. When I did have the option, it showed up on the social activities list at the end after candlelit dinner and romantic movie. It also appeared twice.
I tried it out, and the new skill for all involved showed up as “nv_paintball”. I never tried the second version, but it looked identical in the setup.
On an unrelated note, bowling doesn’t seem to be a developable skill for anyone but yourself.