My father managed to give a a seat in Business class from DXB (Dubai) to DAC (Dhaka). I am certainly allowed to go the Lounges for business class in Dubai airport. But since my father's in economy, can I invite him as a guest to the lounges? I don't want him feeling left out, especially after giving me this privilege on Business class.

He got me business class using his Skywards miles, enough for one person.