It looks like a font and very similar to [if not another version of] WankHands by Alex Hynes [2010, AdultHuman, Donationware]
You can buy the Pro Family here:
https://creativemarket.com/AdultHuman/2739-WankHands-Pro-Family

Looks like a font to me. Note the repeating letters are the same.
Easy to make this type of font and quite a few are available.
Still no exact match but you might like Face Type's Strangelove as a substitute http://www.myfonts.com/fonts/facetype/strangelove/ The name might have ironic connotations for a wedding but refers to Dr. Strangelove, Stanley Kubrick’s cinematic masterpiece about the end of the world in nuclear war. Don't miss Captain Kong with his cowboy hat riding the H-bomb like a bronco as it is dropped from the bomb bay of a B-52 or the beautiful melody of Vera Lynn singing Until We Meet Again as the bombs explode all over the world. Great lettering in a well constructed font.
Don

Thank you fvilanakis and donshottype, they are both similar typefaces but not the same indeed.
I quite liked the "S" and the "J" letters as they are in the wedding invite—narrow but still sort of "open".

Perhaps any other suggestions on narrow fonts?

C.
PS: Dr. Strangelove, excellent film!

You're welcome. Try this one "Pompiere is a narrow sans serif typeface that takes its inspiration from a handlettered sign found outside of a firehouse in New York City" http://www.karolinalach.com/194342/2077414/work/pompiere-typeface and http://www.fontsquirrel.com/fonts/pompiere
Don

Hello Don, thanks again for your suggestions—they are very nice typefaces.
I hope I am not being difficult, but there is something very simple about the strokes in that wedding card font that is just what I am looking for. It has a sort of modernist feel to it. Do you know what I mean? It's kind of a condensed Gotham, but handwritten...

Tks!

C.

Aha ... it appears to be YWFT Hannah. Note that there is variation between upper- and lowercase glyphs.

I found it via this 2011 Typophile thread which features an image of the font's use by Starbucks as well as links to similar fonts.

For anyone who is interested, I was led to that thread by another - which is a very useful, categorized überlist.

Hello Mike F, thank you very much for all the info!

This font is YWFT Hannah indeed. Problem sorted. Fantastic! Cheers. : )

C.

Great find Mike, and thanks for the link to the "list of lists" and the list of similars to YWFT Hannah. Very useful for font detectives.
Don

Glad to help, guys.

I find this style of font especially hard to find because any keyword I think to use (or that the designer assigns themselves) yields all sorts of very different fonts.