I stayed in YMCA before. clean and fuss free. of cos if u got loads to splurge theres the ritz
clubbing... la fabrique is not bad, the people who run it were running sparks in sg last time i think
xin tian di is not to be missed
have wonderful xiao long pao at din tai fung (theres a branch in xintiandi) cos its so cheap compared to SG (S$3 for 10 xiaolongpao)
u can visit this water village close by to shanghai, supossed to be quite quaint. there r day trips there.err.. check with the travel desks there, they dun really rip u off la.
Visit Nanjing road for shopping.. close by there is this "flea market" where they sell loads of fakes and cheap clothes