The Menzingers – After The Party (Guitar Intro Tab)

Half-Step Down (Eb-Ab-Db-Gb-Bb-Eb)

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Chords

  |       Bm         |       G           |      Bm          | G* |
d#|--------------------------------------|-----------------------|
A#|---------7-77-7-5-----------7-77-7-5--|---------7-77-7-5------|
F#|-----7---7-77-7-7-------7---7-77-7-7--|-----7---7-77-7-7---4~-|
C#|-----0~--0-00-0-0-------0~--0-00-0-0--|-----0~--0-00-0-0---0~-| ~ = let ring
G#|--------------------------------------|--------------------5~-|
D#|--7-----------------3-3---------------|--7-----------------3~-|

  |       Bm         |       G           |      Bm          |       G           |
d#|--------------------------------------|--------------------------------------|
A#|---------7-77-7-5-----------7-77-7-5--|---------7-77-7-5-----------7-77-7-5--|
F#|-----7---7-77-7-7-------7---7-77-7-7--|-----7---7-77-7-7-------7---7-77-7-7--|
C#|-----0~--0-00-0-0-------0~--0-00-0-0--|-----0~--0-00-0-0-------0~--0-00-0-0--|
G#|--------------------------------------|--------------------------------------|
D#|--7-----------------3-3---------------|--7-----------------3-3---------------|
||
d#|-------------------------------|
F#|-7*--7*--7*--7*--7*--7*--7-7-7-| each * denotes a slight bend up
A#|-5---5---5---5---5---5---5-5-5-| which amounts to around half a fret
C#|-0---0---0---0---0---0---0-0-0-| in my estimation
G#|-------------------------------|
D#|-------------------------------|
OR in Drop C# Tuning
  |       Bm         |       G           |      Bm          | G* |
d#|--------------------------------------|-----------------------|
A#|---------7-77-7-5-----------7-77-7-5--|---------7-77-7-5------|
F#|-----7---7-77-7-7-------7---7-77-7-7--|-----7---7-77-7-7---4~-|
C#|-----0~--0-00-0-0-------0~--0-00-0-0--|-----0~--0-00-0-0---0~-| ~ = let ring
G#|--------------------------------------|--------------------5~-|
C#|--9-----------------5-5---------------|--9-----------------5~-|

  |       Bm         |       G           |      Bm          |       G           |
d#|--------------------------------------|--------------------------------------|
A#|---------7-77-7-5-----------7-77-7-5--|---------7-77-7-5-----------7-77-7-5--|
F#|-----7---7-77-7-7-------7---7-77-7-7--|-----7---7-77-7-7-------7---7-77-7-7--|
C#|-----0~--0-00-0-0-------0~--0-00-0-0--|-----0~--0-00-0-0-------0~--0-00-0-0--|
G#|--------------------------------------|--------------------------------------|
D#|--9-----------------5-5---------------|--9-----------------5-5---------------|
||
d#|-------------------------------|
F#|-7*--7*--7*--7*--7*--7*--7-7-7-| each * denotes a slight bend up
A#|-5---5---5---5---5---5---5-5-5-| which amounts to around half a fret
C#|-0---0---0---0---0---0---0-0-0-| in my estimation
G#|-------------------------------|
D#|-------------------------------|
These riffs are recurring throughout the song. I think TheUpsides1337 did a good job with the chords which can be found here: https://tabs.ultimate-guitar.com/t/the_menzingers/after_the_party_crd.htm From this I reckon you'll be able to piece the song together.