Data walks in, addresses Picard: Sir, what are you and the Commander doing?

Picard: We're...dancing, Data.

Data: Dancing, sir? Intriguing.

Riker: Yes, Data, dancing. Now return to your post and lock the door on your way out, please. And don't walk into the holodeck without the current user's permission.

Data: Yes, sir.

Riker smiles at Picard as Data leaves.