Oh yes - there's a little device I've come across which I swear by now - it's called a Pub Prop, and it's a little pocket-sized clamp you stick on a table to hold your guitar (or other string instrument) steady while you're talking or getting a drink or whatever. It's a lifesaver in a crowded session. Here is a link to the man who makes them You get a few funny looks when you attach it to the table for the first time, but it's not long and you get someone asking you "where can I get one of those things?"