Few colds are bacterial and when they are (in people of average health), they're usually a secondary infection after having a viral cold. Incubation periods (the time between exposure to the virus and when symptoms start) with colds vary dependant on a lot of things, but it would be very rare to start getting symptoms 8 hours after exposure to the virus. It usually takes anywhere from 24 hours to 5 days.
Cold viruses can't survive all that long outside the human body. You'll hear up to 48 hours, but that would have to be one big loogie. Most often it's in a tiny droplet of mucous or salive and they might last a few hours before they dry up and "die" (it's scientifically questionable whether a virus is really "alive" in the first place, since it's just some DNA or RNA wrapped in a protein coat). So, the transmission is person to person, not through beer lines.
OK, I'll stop now... bottom line is, you had that cold coming before you even went out those nights.