The two hobos asking for chili and mustard on their hot dogs are Albert Band and Gordon Hunt, the fathers of director Charles Band and Helen Hunt, respectively.
After the interview on TV there is an ad for Kampf der Roboter (1990) also directed by Charles Band.
The two elderly ladies at the Landscape Company are the mother and (now ex-) mother-in-law of producer/director/Full Moon CEO Charles Band.
Richard Lynch's (Dr. Wardo) real life son, Christopher Lynch, can be seen playing Wardo's cameraman.