I think a Makarov will make a nice tuxedo gun
I don't know how anyone could think anything but "Walther PPK" when they think "tuxedo gun".
No, but really. When I was a little kid (age 2 til about age 7), I was obsessed with tuxedos, and formal wear in general. My favorite song was "Sharp dressed man" by ZZ Top, and naturally, I idolized James Bond. I wore my tux any chance I had, and I so badly wanted a Walther PPK in a shoulder holster to go under my jacket. I settled for a snub nose cap revolver, and my dad rigged me up a little shoulder holster for it. I had the Bond theme on a cassette tape, and I would put it on the stereo, put on my tux, and practice walking out, turning, drawing, and shooting in front of the big mirror we used to have, just like the opening sequence of all the Bond films.
I always planned on getting a PPK when I grew up, and carrying in a shoulder holster it under my tux when I get married... you know... just incase someone from Spectre, or Auric Goldfinger, or Jaws or anyone like that decides to show up and crash the party.
I still plan on getting a PPK when I turn 21 in two months, and if and when I get married, it will be under my tuxedo jacket, if for no other reason than out of principle for fulfilling a childhood dream.