Arsalan is strictly for casual dining and take-away. Their Biriyani tastes like heaven but the service is very very slow. Well to be honest the restaurant is always overcrowded and so less waiters to serve customers, it's expected.
But people like me who are crazy and drool on their Biriyani keeps on coming back against all odds.
If you are in Kolkata and haven't tasted in Arsalan then what have you done??!! Keep it in list at par with Victoria Memorial.