It's a broad topic.
I'm not sure what kind of joint this is. I can say i'm sipping on a Dogfish head Palo Sannto Marron and get laughed at or say "damn...I love me some Natty Ice" and see if I blend in.
Broad topic man.
I think you'll find both crowds here.
When I go to a restaurant, I like to drink the local flavor. For instance, when we go to an upper-end Chinese restaurant, I'll have a Tsing Tao, or when I go to a hibachi grill, I'll have a Sapporro. I'll down a few big blokes of Foster's at Outback. I'll have an Old Milwaukee's Red when I go to Landry's. You get the drift.
When I'm out at a bar and I know it's going to be a long night, I'll usually stick with Miller Lite. If I go up to the Fox and Hound on $2 pint night, I'll try any beer that I haven't had before, and I never get the same beer twice. I am a beer lover in general. I'll drink anything.
One thing remains constant, though - and that is that free beer is the best tasting beer of all.