Outside Grill 13 lies a small movie theater. This theater is advertising a film entitled "Biohazard 4". This is a reference to the series, which is known as "Biohazard" in Japan. When Resident Evil 3: Nemesis was released in 1999, early development of Resident Evil 4 was also going on; this became Devil May Cry, however.
I love you, Shinji Mikami
If one looks closely at the Exit button in the Epilogue, under it reads, very illegible, "I Love You, Shinji Mikami, Return to Menu!".
When getting the Future Compass (near the Grill 13 restaurant), you can read in the plaques, the words "SNAILIVIC TSUM EVOMER GOD TNEMERCXE" (Downsided) or when read backwards, it says "CIVILIANS MUST REMOVE DOG EXCREMENT". It is believed that this might have been a sign recycled from the beta version of the game, or just a joke from the developers. You can also read the "full" version of that message after you've exited the warehouse (the place with sitting zombie). The message says "DOGS, BE ON LEASH AND OWNERS MUST REMOVE DOG EXCREMENT."