Call me a crazy (or clever) drunk, but couldn't this mode of "exercise" be achieved on a simple barstool? My unsolicited advice: Forget buying the overpriced lawn chair advertised below and stick to the pubs instead. You can sit on a stool for free and a cold, frothy means of hydration will be readily available in the mug right in front of you. Voila! I totally missed my calling as a life coach.