Dearest Claimants:
Well, darlings, I can stand it no longer.

It is time for a punctuation lesson . . . namely, the use of the apostrophe!
Not that I'm an expert dialectician and grammarian, but I was--once upon a time--tutored by Henry Higgens himself. So, without further ado:
In the English language, apostrophes are used for two major purposes: 1) to denote possession, and 2) to form contractions.
Now, regarding the latter, I am not talking about anything to do with childbirth.

But we English speakers do like to combine our words, i.e., isn't for is not, haven't for have not, and so forth.
On the other hand, to use an apostrophe when speaking of more than one item, i.e. LP's, is not exactly cricket, my dear claimants. So, it is LPs. And DVDs. And BVDs. Unless, of course you are speaking of the BVD's occupant.
Same with M & Ms. Unless you are talking about something they possess, such as "That M & M's color is just waaayyy too gnarly!" (Pardon my jargon.)

Oh, and of course this rule applies to the punctuation of GD/GPs, when you are speaking of more than one GD/GP. On the other hand, if you are speaking of the GD/GP's tendency to be AR, then certainly an apostrophe is in order.
The worst violation of this concept, by the way, I found not amongst our royal claimant selves, but at a certain Trader Joe's grocery store. (Yes indeedy, "Joe's" is correct, since it is
his store!) The major faux pas? A sign that said "Christmas cookie's." I wanted to scream outloud, "Christmas cookie's
WHAT?!"
[Dashes glass of cold water on one's self.]Very well. I have regained my composure. So, taking what we have just learned, to speak of going places means to go to more than one place, soooooo . . .
no apostrophe!

Oh, and 42nd isn't 42'd.

Enough imperial finger wagging for this installment. See y'all (you all; rather slangish, to be sure, but a valid contraction of sorts) later!
The Nose-up-in-the-Air GD/GP Janet
A Member of the Punctuation Police