Hi Uncle,
Kudos to your concept! Really feels like Indian mentality is finally progressing!
My question is : is it fine if I check in with my foreigner girlfriend?
we both are above 18
we both want to take our relationship further and spend some time together.
will the hotel refuse us?
what proof is required on her part? I have my local id
Ahhh!! Lovely to hear from you uncle!!
Checking in is not a problem. All you need is a valid govt ID proof like Adhaar card, Passport, Driver's license or voter's ID. Any of these will do in originals.
Your partner needs to present her Passport as well as visa in original to present at the time of check-in.
That's it. 
Happy to have you!! Come come!!!! (pun intended 
)