Orion mall is located in Rajajinagar, Bangalore is a great place to spend time in.
It has a wide range of stores but most of the stores are those of high budget types. There's PVR for the movie buffs and also Pepsi BluO for bowling which was really fun.
Coming to the shops we have Starbucks, McDonald's, subway, sbarro and Rajdhani among the few food outlets there.
In terms of clothes there's a lot of variety UCB, Zara and all but the clothes are really overpriced.
The best part of the mall complex would definitely be the artificial lake behind in the premises. A great place to sit, take pics and have long chats. On the whole it's a good place to while away time and have fun with friends.