Encountering Creepy Behavior in Trivandrum's Party Scene

The party scene in Trivandrum is disappointing. Last night, my fiancée and I went to a newly launched resto-bar. We’re in our late 20s, and since I was feeling a bit under the weather, I stayed in my chair sipping my drink while she went to dance alone. Unfortunately, a guy in his early 20s deliberately touched her back,she grabbed him by the hand and handed him over to the bouncers. It’s honestly exhausting dealing with this kind of behaviour.I don't understand what these guys gain from this kind of creepy behavior.While the bouncers did step in, it makes us wonder how safe these places actually are. Anyone else had to deal with something like this?