Thanks for info on the Star Alliance club. We would actually be flying Delta biz class, but I will have two United Club passes as a result of having a Chase United credit card. Assuming we'd have to enter security/passport control at Terminal 2 since we'd have DL boarding passes, could we get to Terminal 3 airside? Can get between T1 and T2 but don't know about T3. UA's Web site shows no UA club (maybe the one in T1 closed?).

Main reason to use the UA or Star Alliance club rather than the Gol club (no Delta Sky Club at GRU anymore) would be to use the showers. Last time we used the Gol club at GRU there were no showers, but the club's Web site says there are showers at both GIG and GRU (GIG club is a bit different since it's a consolidated club used by several airlines).