Can assault be consenual? And why is it OK in a club, not a pub? Do the boundaries of decency evaporate when you enter such a place, thus making it acceptable?
To comment on the latter question first; there are clubs, venues etc where the sole object is that of seeking sexual gratification. The habitués know the score, the entry price, the club rules etc and that's fine should one choose to go that way.
A Pub however, in my understanding is open to all and sundry (Landlord's discretion notwithstanding) and consideration to other members of the public enjoying a drink and a bit of social interaction is called for.
Assault? I mean intentional libidinous foreplay