Keeping them warm for serving could be a challenge. Electric griddles usually have a warm setting and will work well. I have an old heated serving tray that works. A large crock pot will work with crumpled-up aluminum foil in the bottom, so the bottom layer does not set in drained liquid. Use a low setting. For food safety, keep the temperature above 140° if they are out for more than 2 hours (they will not last that long at most parties).