I went to my prom...with my cousin. Yep, I got asked by a number of boys but could only go if I took my cousin. I knew a few other witness kids that lied about going to gathering at a JW house but actually went there to change their clothes and headed to the prom.
In my area there were "JW proms" where a couple of families would get together, rent a banquet hall and invite a bunch of people (teens and adults). Just like a real prom, you had to pay for a ticket to go the the "JW prom". Folks would buy formal attire and everything. I didn't go to any of the JW proms as I thought they were a waste of time. There were plenty of local needs talks about these types of imitation proms and they eventually stopped after a few years.