Im not sure all of this tab is right, but it's pretty close.
INTRO
---------------------------------
---------------------------------
---2----2--2-----4---4--5-------- play this about four times
-0---0-3--3--3-5---5------5------
---------------------------------
---------------------------------
--------------------------------- play this a couple of times
----------------9----------------
7-7-7-7-7-7-7-7--7-7-7-7-7-7-7-7-
---------------------------------5
---------------------------------
verse
[ Tab from: https://www.guitartabs.cc/tabs/m/millencolin/in_a_room_tab.html ]
---------------------------------
---------------------------------
---------------------------------
--------------------5------------
---7-7-7-7--3-3-3-3-3-5----------
---5-5-5-5--1-1-1-1---3----------
chorus
-----------------------------------
-----------------------------------
-----------------------------------
----------------------------7-7-7-7
-7-7-7-7--3-3-3-3--5-5-5-5--5-5-5-5
-5-5-5-5--1-1-1-1--3-3-3-3---------
well, thats it. this is my first tab, i hope it's right. if it's drastically
wrong, email me at mattrules@boardermail.com