1. girl lying on the floor on her belly, guy above her. options include hands on her shoulders pinning her down, hand on her throat, hips slightly raised (like on a pillow), vagina or ass
2. guy standing, girl wrapped around him and riding: legs around hips, arms around neck. options include free standing, him or her leaning against a wall
3. draped over the back of the sofa
existing poses but a bondage pack (I think someone mentioned): arms tied behind back, behind head or above head
groups of people at a party standing around chatting with drinks (or just shadows/outlines for simplicity of rendering)
an S&M pack: spanking, riding crop on soles of feet, inner thigh, pussy, bum, breasts. depending on the person's preference and preference modifier, they'd either be excited by a lot or not so much thus requiring gentle play.