The restriction at 65 is on commercial and public transport operations.
You can continue to be employed as a pilot and yes, you can continue to fly in the corporate sector.
You must not however be involved in commercial or public transport opps.
If a wealthy owner of a fancy business jet wants to pay you to fly him around, there is no age restriction.
You could also stay on in the employ of an airline and fly training flights, air tests and ferry flights. No restrictions there either.
Good Luck!