Journey to the End of East Bay - Rancid is my favorite bass line to rip out when Im in a shop or trying to show off.
tab stolen from here:
http://hem.passagen.se/ak5/rancid/ta...e_east_bay.txt
G|-------------4---4---------6-9-6---------------|
D|---2-3-4-5-5---5---5-5-5/7-------7-3-----------|
A|-3-------------------------------------0-1-2---|
E|-------------------------------------1---------|
G|--------------------------------------------------|
D|---2-3-4-5-5-5-5-5-5-5-3-------------2p0----------|
A|-3-------------------------0-1-2-3-3-----3p0------|
E|-------------------------1--------------------3p0-|
G|-------------4---4---------6-9-6---------------|
D|---2-3-4-5-5---5---5-5-5/7-------7-3-----------|
A|-3-------------------------------------0-1-2---|
E|-------------------------------------1---------|
G|--------------------------------------------------------|
D|---2-3-4-5-5-5-5-5-5-5-3-3-3-3-2-2-2-2-0-0-0-0----------|
A|-3---------------------------------------------3p0------|
E|----------------------------------------------------3p0-|
Otherwise some simple chilli's riffs like Higher Ground as mentioned above, or the bass riff from RATM's Take the Power Back sound pretty good too.