Help for World Cup in St. Petersburg

I am new to Belarus just moved from America and will be living here for the year but plan on going to St. Petersburg with 2 friends for the World Cup.  We are looking for a place to stay that is inexpensive we are staying from the 18th and leave on the 23rd.
We are going to be occupied for the games on the 19th and 22nd but other than that we are open to travel so along with a place to stay we are looking for good suggestions of places to see but we are not looking for the usual tourist places we want the local flavor and neat places to and have some social life. 
We are not looking for anything but a room we could all share, expense is our main concern we are living on a limited budget so if you know of a floor, room or flat that is relatively cheap please will you tell me about it.

Thank You in advance
Tom

Hi Tom,

I invite you to post an ad in the housing in Saint Petersbourg section.

Good luck,
Christine

Thank you

Thank you for your suggestion I just posted.

Tom