If you have a time machine avoid eating the pork served near the coliseum after The Games have been going for a while. No reason.
http://www.freerepublic.com/focus/chat/3145694/posts?page=14#14
in case that link doesn’t lead to a working link:
http://www.google.com/search?q=ostia+antica+thermopolium&sa=X&oi=image_result_group&tbm=isch
in case that link doesn’t lead to a working link:
http://www.google.com/search?q=ostia+antica+thermopolium&sa=X&oi=image_result_group&tbm=isch