Going to movies, dances, or other events in a group is a good idea for teenagers because, all of the above.
All of the options listed are positive effects towards the teenagers, which make them safe in the situation. Going out with friends does remove the expectation of sexual activity, can reveal a lot about a person, and allows others to get to know each other.
If you monitor your practice run you can see how much your improved time wise.
In front of windows or even outside try staying away from open doors as well
Hope this helps, good luck ;)