The Memorial, when done correctly, can be a spiritual experience for everyone. For starters, I do not remember anywhere in the Bible that said that it has to be at the Kingdumb Hell or that there has to be a boring 45 minute talk before it. In fact, it is best done in small groups (say, about a dozen people). Families might in fact observe it at home together, and everyone partakes (in case anyone is worried about children and alcohol, unfermented grape juice may be substituted since it's the grape juice and not the alcohol that makes the celebration, and it's really the thought of observing it that makes the experience).
The Watchtower gets it totally wrong. First, they are not supposed to be in groups approaching 200 in size. If anyone does partake, everyone would need to be able to observe it. And when they have more than one huge room, not everyone is going to see. In fact, those near the front would not be able to see the apostate in the back eating all the stale crackers or drinking all the wine.
Second, they do not allow most people to partake without feeling unworthy. This is blatantly wrong. It was meant for everyone present to partake. What they meant by partaking unworthily had more to do with hogging the whole meal, or perhaps doing so in such a way as to totally distract from the intended purpose. Which to me would be quite difficult to do, since if Judas Iscariot (who betrayed Jesus) partook, I would have a hard time finding out who would not be worthy of partaking. All who observe the event are supposed to partake.
And there is not supposed to be a boring 45 minute talk before the main event. They are supposed to get everyone together (and there should be a small group, 12 being a good estimate of the limit) for a quiet event. They say a prayer and then observe the event. It should last about 15 to 20 minutes, since it is a simple event.
How often? Most churches do it every week. There is no blatant indication in the Bible as to how often one does this--one does it as often as one does it, which provides absolutely no guidelines. Some people might do it yearly. Others might prefer weekly. Still others might find it better to do it on special occasions, such as for Easter or Christmas. One might observe a child's baptism or confirmation this way, or the day they officially disassociated from the witlesses, as a marker to decide when to observe this. Nowhere in the Bible does it say that people are obligated to observe it on Nisan 14 and no other time of year.
Another mistake they commit is having everyone pioneer during the surrounding months. Observing the Last Supper should be a semi-private event, and there is no need to hound people to pioneer during March, April, and May because of it. The event itself should be the spiritual event, not going out in field circus all season long. There is no season for this observation, since different people or groups might prefer to observe it at different times. Or, there is the option of not doing it at all--the Bible only stated "As often as you observe this", and if you do not observe it, you are not obligated to.
I will not be walking into the Kingdumb Hell that night. I have no use for anything that makes what could have been a spiritual event into an opportunity to hound those who are irregular or to drive more people in. I suggest that it is better to observe this in family groups or in gatherings around 10-12 people in lieu of going to the Kingdumb Hell. That way, it will be that much more special and less a sales/hounding pitch.
And, Happy Easter.