Wiktionary
vb. (context idiomatic usually followed by with English) To associate closely; to socialize or mingle.
Usage examples of "rub shoulders".
Fabulously wealthy, he believed: for his part he deeply deplored the degeneracy of the times, and was happy to think he could remember the days when mere vulgar wealth would not have made it possible for a Mrs Floore to rub shoulders with my Lady Spenborough.
What he needs is to rub shoulders with sprigs of his own age and tastes—.
The finest ladies have to rub shoulders on the streets with sailors and soldiers who travel around the world.
He went without saying that the cull disliked anything anyway approaching a plain straightforward standup or knockdown row and, as often as he was called in to umpire any octagonal argument among slangwhangers, the accomplished washout always used to rub shoulders with the last speaker and clasp shakers (the handtouch which is speech without words) and agree to every word as soon as half uttered, command me!
How fortunate you are to have been invited to live here, where you will at least be able to rub shoulders with people of superior breeding.
The idea of having to rub shoulders with a female garrison was less appealing still.