In my theatre, everyone laughed when Gale saw Peeta and Katniss kissing on the tv. I guess most of them were Katniss/Peeta shippers.
I heard a couple of them sniffing when Rue died. They also clapped when Clove got bashed up after attacking Katniss (a bit cruel, if you ask me, but I understand why they did it) and when Katniss and Peeta won. (: