training room at upstairs vs training room in upstairs

Some examples from the web:

• Then there's the training room.
• Zatt, close the door to the training room.
• It will take place in a dedicated training room containing a simulated production line with wooden cars.
• In this way, participation in ERM II can be considered as a «training room» to qualify for euro adoption.
• And I had incessant fun making fun of him in the training room because he'd come in with foot injuries.
• We had some grand battles in this training room, you and I...
• I boiled the pasta in the hot tub in the training room.
• After my nuna gets married, this will be my personal fitness training room.
• When my sister gets married this room is going to be my training room.
• Elvis' gold record room at Graceland.
• Parker. The server room at global transit airlines.
• I booked the banquet room at The Oaks.
• My dad came into my room at bedtime.
• The setting up of virtual training rooms, for example, is one way of achieving the goal of exchanges of good practice between teachers in the different Member States, at both methodological and teaching level.
• The goal can really become that of exchanging methodological and didactic 'good practice' between teachers in various Member States, or the start-up of 'virtual training rooms' for training targeted at teachers who need to update their own professional skills.
• At the request of the School and depending on availability, the institutions shall provide it with training rooms in accordance with rules to be set by the Management Board.
• The auxiliary installations include the Integrated Centre for Rail Services ('Centro Integral de Servicios Ferroviarios', 'the CISF') which hosts laboratories, offices and training rooms.
• This police station has a designated room at the Sheraton.
• It's a holographic program set in the drafting room at Utopia Planitia.
• We've provided a room at our hotel for you to recuperate.

Some examples from the web:

• At the request of the School and depending on availability, the institutions shall provide it with training rooms in accordance with rules to be set by the Management Board.
• Then there's the training room.
• Zatt, close the door to the training room.
• It will take place in a dedicated training room containing a simulated production line with wooden cars.
• In this way, participation in ERM II can be considered as a «training room» to qualify for euro adoption.
• And I had incessant fun making fun of him in the training room because he'd come in with foot injuries.
• We had some grand battles in this training room, you and I...
• I boiled the pasta in the hot tub in the training room.
• After my nuna gets married, this will be my personal fitness training room.
• When my sister gets married this room is going to be my training room.
• I'm Will. I just moved in upstairs.
• There's stuff plugged in upstairs that I've got for work.
• They lured us in upstairs at the prison's weak point.
• In the fall of 2009, a new couple had moved in upstairs.
• According to uniform there's signs of a break-in upstairs.
• The setting up of virtual training rooms, for example, is one way of achieving the goal of exchanges of good practice between teachers in the different Member States, at both methodological and teaching level.
• The goal can really become that of exchanging methodological and didactic 'good practice' between teachers in various Member States, or the start-up of 'virtual training rooms' for training targeted at teachers who need to update their own professional skills.
• The auxiliary installations include the Integrated Centre for Rail Services ('Centro Integral de Servicios Ferroviarios', 'the CISF') which hosts laboratories, offices and training rooms.
• I just moved in upstairs, and I was about to take a shower...
• But when I saw your partner go in upstairs, I... I got worried.