Kid Rock & John McEnroe -- Beer Buds

6/23/2010 10:30 AM PDT BY TMZ STAFF
Legendary loud mouths Kid Rock and John McEnroe got their pub crawl on together in London last night.

The night started when McEnroe attended Kid Rock's concert at the O2 Arena in London.

But the real fun didn't begin until after the show, when the two met up for some late night debauchery. 

No doubt some party fouls were committed.