WiseGuys has the Nick Offerman presale code: When the Nick Offerman presale starts, YOU WILL have an opportunity to get tickets before they go on sale. If you don't get your tickets to Nick Offerman's show in a city near you during the presale you might not be able to acquire them before they become sold out.
Here are all the Nick Offerman performance details:

Nick Offerman

(Presale begins in the local timezone of the show)
JUL 20 - Global Event Center at WinStar World Casino and Resort, Thackerville, OK
SEP 11 - Fox Cities PAC, Appleton, WI
SEP 12 - Riverside Theatre, Milwaukee, WI
SEP 13 - Orpheum Theater, Madison, WI
SEP 15 - The Chicago Theatre, Chicago, IL
SEP 26 - Stephens Auditorium, Ames, IA
SEP 27 - Music Hall Kansas City, Kansas City, MO
OCT 10 - The Masonic, San Francisco, CA
OCT 12 - Vina Robles Amphitheatre, Paso Robles, CA
OCT 24 - Chevalier Theatre, Medford, MA
OCT 25 - The Palace Theatre Albany, Albany, NY
NOV 2 - The Met Philadelphia, Philadelphia, PA
NOV 3 - Beacon Theatre, New York, NY
NOV 7 - Stifel Theatre, St. Louis, MO
NOV 8 - The Louisville Palace presented by Cricket Wireless, Louisville, KY
NOV 9 - Knoxville Civic Auditorium, Knoxville, TN
NOV 10 - Ryman Auditorium, Nashville, TN
NOV 20 - State Theatre, Kalamazoo, Kalamazoo, MI
NOV 21 - The Fillmore Detroit presented by Cricket Wireless, Detroit, MI
NOV 22 - Palace Theatre Columbus, Columbus, OH
NOV 24 - Kodak Center, Rochester, NY
DEC 5 - Hard Rock Live Orlando, Orlando, FL
DEC 7 - Tampa Bay Perf Arts Ctr Morsani Hall, Tampa, FL
DEC 8 - Tabernacle presented by Cricket Wireless, Atlanta, GA
DEC 12 - Paramount Theatre, Denver, CO
DEC 14 - Balboa Theatre, San Diego, CA

Onsale to General Public
Starts Fri, Mar 22 @ 12:00 pm

Artist Presale
Starts Tue, Mar 19 @ 10:00 am
Ends Thu, Mar 21 @ 10:00 pm

Live Nation/ Mobile App Presale
Starts Thu, Mar 21 @ 10:00 am
Ends Thu, Mar 21 @ 10:00 pm

Local Presale
Start: Thu 03/21/19 10:00 am
End: Thu 03/21/19 10:00 pm
You can use this pre-sale passwords and information to buy your tickets: