Firstly this is in the wrong section
Secondly, I think it depends on what band you're in. The title of the band I'm in gives it away at our gigs so we never get jumped on with people asking for 'Crazy Train' and 'Freebird'.
The requests we do get are usually 'Elvis/Kinks/Rolling Stones/Beatles/The Jam'. More often then not though we're aiming to do the song they request by the end of the night. There's two songs 'Ghosts' by The Jam and 'Broken Stones' by Paul Weller, that were requested and are now part of our line up.
The ones that create the biggest frenzy are the ones they really know and can dance too, these are the ones we normally stick in the second set but at some gigs the whole set can get them up dancing all night. Usually the best ones for us are: Jumping Jack Flash, Satisfation, Lazy Sunday Afternoon, Tin Soldier, David Watts, In The City, Start, Eton Rifles and Town Called Mallice.
One thing we have come to terms with, is that songs that go down well in some places wont go down so well in others. That's why it's always best to have a nice pick and mix of songs to go with, or try to remember what went down well the last time you played at that venue.