I actually get asked quite often to handle the BBQ at family and friends because they know I can cook. I usually don't mind and try not to criticize their equipment to much, maybe some friendly smack. If the equipment has been neglected to the point I don't think it is useable I will offer advice and kindly decline cooking duty. If I know in advance that I will be asked to handle the Q I make sure to bring my Themapen and my favorite tongs maybe a basting brush and sometimes even my Maverick remote. I can usually adapt to any contraption they might have. Like Bluedawg said it's just heat and meat.
18.5 WSM 18.5 Jack Daniels OTS Weber Genesis