room to have sex with someone else or have you been the other person?
Not like that. Invading the host's bed does not seem proper, unless they give permission. In the past I have found an out-of-the-way spot such as a back porch, garage, and so forth for a stand-up quickie with my date or more recently my wife.
Yes I have, more than once, and I'm sure I'll do it again lol