Anight-club bouncer, now a top official,
put coke or pepsi in it; first three initial.
combine all lakes; but i still have more,
of all the places; i have the largest shore.
what am i?

Canada

Explanation:

The answer to this riddle is Canada:

"A night-club bouncer, now a top official" is a reference to Justin Trudeau, prime minister of Canada,  who used to be a nightclub bouncer and a snowboarding teacher.

"Put Coke or Pepsi in it; first three initial" refers to the word "can", meaning both the container of Coke or Pepsi and the three first letters in "Canada".

"Combine all lakes, but I still have more" refers to the fact that Canada has more lakes than all the lakes in the world combined.

"Of all the places; I have the largest shore" refers to Canada having the longest coastline in the world.