The best thing for a night out is to keep sauces, etc seperate where possible. Then if you have steak, new potatoes and sweetcorn or whatever you know this is free, i then do a generic search on the SW website for the sauce and syn it like that. Also ask what things are cooked in and remember that you can ask to substitue food in most places ie chips for new / jacket potato
The best way to do it is too work out what your having before you go.