Rub shoulders with somebody
Definition 1 of 1
Pro Tip 1/3Informal Idiom
Used in casual contexts, not suitable for formal writing or speech. 
At the reception, I got to rub shoulders with local artists.
Pro Tip 2/3Figurative Speech
Metaphorical, means socializing and doesn't involve actual physical contact. 
During the fundraiser, donors rubbed shoulders with influential politicians.
Pro Tip 3/3Potential Prestige
Implies the possibility of gaining status or feeling privileged by the association. 
By volunteering at the event, you may rub shoulders with some big names in the industry.