I did a night of 3 mini tournaments a few weeks ago and everyone enjoyed it. The blinds go up very fast but you start with a fairly deep chip stack so it isn't too bad. By making each tournament around an hour and a half people are more likely to stick around for the next one instead of just taking off.

2500 chips start, 6 players. 10 minute rounds.
Blinds:
25-50
50-100
100-200
200-400
300-600
500-1000
700-1400
1000-2000
2000-4000


Good luck!

-d