Offset kept the party going after crashing Cardi B‘s set with a second birthday bash for himself, where he covered up his face … but not in shame or anything. Quite the opposite.

After ambushing Cardi’s Rolling Loud set Saturday and begging for forgiveness — which he didn’t seem to receive in the moment — the Migos MC rolled on over to the Wilshire Ebell Theatre in L.A. … where he was decked out in all gold and a diamond-crusted…