(1)_______________________.Big corporations may have clubs,sports teams, trips, dance classes,or other employee activities which you can join or not as you like, while small companies usually can't afford these activities.In general, people go to lunch with each other by invitation when they feel like it.(2)_______________________.Except for special occassions,everyone pays for himself or herself regardless of whether or not an invitation is offered.It is quite acceptable for men or women colleagues,single or married, to go out together for lunch.This may be the extent to which your office friends will invite you.(3)_______________________.If this is the case in your place of work,you will have to seek your friendships through other channels.